Literature Review

Although horizontal accountability mechanisms proposed by opposition parties have been tested in parliamentary regimes (Lijphart Reference Lijphart2012; Williams Reference Williams2016), academic literature on this topic in presidential regimes is limited. Research on those mechanisms in presidential systems focuses on impeachment procedures and policy monitoring. Impeachments are proposed by the legislative power to expose presidential mistakes and express discontent after policy shocks (Llanos and Pérez-Liñán Reference Llanos and Pérez-Liñán2021), especially when exposing presidential involvement in corruption scandals (Kim Reference Kim2014), and partisan support in Congress for the president reduces the hazard of impeachment execution (Martínez Reference Martínez2017). Conversely, cabinets created by ideologically distant party coalitions provide stronger policy supervision among coalition members, resulting in lower ministerial replacement in the government (Silva and Medina Reference Silva and Medina2022). In sum, the current literature on this topic in presidential systems has left out a critical tool of legislative oversight: NCMs toward cabinet members.

Indeed, certain features of presidential systems affect the use of NCMs against cabinet members. Gerring et al. (Reference Gerring, Thacker and Moreno2009) claim that presidential systems politics predominantly center on the performance of individual politicians rather than established organizational entities. The lower and upper houses of a bicameral legislature in presidential systems have dual legitimacyFootnote ² , which affects NCMs (Mainwaring and Shugart Reference Mainwaring and Shugart1997). In addition, the fixed terms in presidential systems could impede the efficacy of NCMs if they were proposed before legislative and executive elections (Linz Reference Linz1990). Moreover, the legislative and executive powers have incentives for cooperation, such as joining and maintaining government coalitions in highly fractionalized presidential party systems (Cheibub and Limongi Reference Cheibub and Limongi2002). These incentives, plus the use of particularistic norms, such as corruption, clientelism, and patrimonialism, could produce a negative vote on NCMs (Helmke and Levitsky Reference Helmke and Levitsky2004).

Explanations for the instability of cabinet members examine topics of coalition building as a policymaking strategy (Martínez-Gallardo Reference Martínez-Gallardo2012). Also, fragmentation in presidential cabinets, the strength of cabinet parties in Congress, and their economic performance significantly impact the tenure of cabinet ministers (Shin Reference Shin2013). In sum, institutional and contextual factors characterizing legislative-executive relations are relevant for understanding the effects of NCMs in presidential systems.

In Latin America, the 12 countries that can use the NCM mechanism diverge in their treatment of an NCM vote. These countries are Argentina, Bolivia, Colombia, Costa Rica, Ecuador, El Salvador, Paraguay, Peru, Guatemala, Panama, Uruguay, and Venezuela (Duque Daza Reference Duque Daza2015a). Scholars can track polity variations and their impact on NCM binding decisions that lead to member resignation or removal from office.Footnote ³ The scope of NCMs varies between countries and depends on whether they apply to the chief of cabinet of ministers or all cabinet ministers.Footnote ⁴ Research also suggests that in presidential systems, crucial factors affect NCM execution, such as inadequate personnel training and institutional capture by hegemonic political projects affecting enforcement (Alcántara Reference Alcántara, Alcántara and Thiébault2017, Page 15). In sum, NCMs in Latin American polities are rare events, and opposition legislators face tremendous challenges in successfully removing the targeted cabinet minister.

This inquiry recognizes the relevance of the contextual factors surrounding NCMs in presidential systems in Colombia and Peru. Both countries share a common historical heritage, the potential to elect outsiders as presidents, and state weakness reflected in security threats, among other issues. Conversely, these countries provide substantial variation to understand NCM proposals within different polities. For example, their constitutions differ in using NCMs, and their presidents adopt different cabinet appointment strategies, and their party systems contain many variations. These elements are key assumptions to properly analyze the strategic interactions between political actors who intend to override or sustain a cabinet member in their portfolio. Several studies of party coalition governance in presidential systems emphasize the influence of presidential powers on shaping the timing and agenda setting of the legislative power (Figueiredo and Limong Reference Figueiredo and Limongi1999, Reference Figueiredo and Limongi2000; Shugart and Carey Reference Shugart and Carey1992; Shugart and Haggard Reference Shugart and Haggard2001; Colomer and Negretto Reference Colomer and Negretto2003; Freitas Reference Freitas2016). Here, I argue that critical events also affect the relationship between NCMs and cabinet instability.

Theoretical Expectations

I theorize that in presidential systems, policy shocks incentivize opposition legislators to propose NCMs to highlight the incompetence, wrongdoing, and need for turnover in the leadership of cabinet portfolios appointed by the president. Let us consider what prompts opposition legislators to propose an NCM when a public scandal emerges. One could argue that those opposition legislators propose NCMs to gain public recognition through legislative oversight actions toward the ruling government in this context. Still, those legislators should execute those proposals strategically because using them is not usually effective, but it could raise public awareness, leading to cabinet instability.

Policy shocks create uncertain political environments, affecting cabinet member instability in presidential systems. Lupia and Strøm (Reference Lupia and Strøm1995) argue that potentially critical events “are meaningful only if they affect politicians’ abilities to achieve their legislative and electoral goals (p. 652).” Policy shocks framed as critical events can be caused by exogenous or endogenous factors. Salient policy shocks affect cabinet members’ pursuits because they attract the critical eyes of the public and opposition legislators, who can take the opportunity to highlight the improper management of the cabinet portfolio.

Examples of policy shocks range from corruption scandals to a decline in the public perception of security. These political upsets provide unique opportunities for opposition legislators to utilize NCMs to signal a policy failure to the public, questioning the government’s overall performance (Williams Reference Williams2011). Moreover, policy shocks increase the risk of minister turnover in presidential systems, but their effects are constrained by strategic considerations (Camerlo and Pérez-Liñán Reference Camerlo and Pérez-Liñán2015a). Thus, when a policy shock emerges, opposition legislators may initiate NCMs against cabinet members to undermine the executive power’s range of maneuver.

Modeling NCMs using a simple formal model based on a sequential game serves to frame the strategic interactions between political actors involved in this horizontal accountability process. This model assumes that those actors—opposition legislators, cabinet members, and median legislators—choose from a set of available actions in a sequential game, in which each step provides ranked preferences for producing particular outcomes. The action I consider in this inquiry is the NCM proposal in Congress by opposition legislators against cabinet members. Based on the formal model that explains this mechanism in parliamentary systems (Williams Reference Williams2016), I update it to show how it works in presidential systems. In this revised model, I include new nodes that express the possibility of the resignation of the targeted cabinet member.

The model assumes that all players are rational actors and make choices to achieve specific outcomes. Moreover, I assume that all players are policy maximizers and that Congress members are policy- and office-seeking agents. This means that opposition legislators want to show themselves as a more reliable ruling government alternative or to change the behavior of the incumbent government; active cabinet members want to finish their terms; and median legislators want to be reelected and to influence policy.

Figure 1 shows the payoffs for each outcome in an NCM procedure against cabinet members in presidential systems, as ranked by the players’ lexicographic preferences. These preferences involve ranking choices and selecting the most important option. The information in this sequential game can be assumed to be perfect, although the payoffs for each move may be subject to scrutiny. But scholars can use information about previous choices to predict the future behavior of a specific legislature.

Figure 1. Formal Model of No-Confidence Motions (NCMs) Against Cabinet Members in Presidential Systems

In this game, there are three players: an opposition legislator (OPP) who proposes the NCM in Congress due to the emergence of a policy shock, the cabinet member (CM) who faces the NCM in Congress, and the median legislator (ML), who is a key actor to approve this horizontal accountability mechanism.

One could analyze the players’ behavior in this sequential game using backward induction. Looking ahead to player CM in the last node, their optimal choice is to resign after surviving an NCM procedure in Congress (CM-R*), so we can convert their decision node to a terminal node with payoffs (3, 7, 9). In the previous node, the ML compares the CM’s payoff from approving the NCM procedure (NCM-A) (7, 5, 8)—that is, a payoff of 8—against a payoff of 9 from NCM-A in the terminal node if they decide to reject the NCM procedure (NCM-R). ML would opt, then, for NCM-R. Therefore, considering that in the previous node, the optimal choice for the CM is to stay (CM-S) when OPP proposes an NCM with payoffs (2, 4, 6)—that is, a payoff of 4—against a payoff of 5. Moreover, the OPP would begin the game by choosing between presenting the NCM proposal to Congress for the first time and ending the game ends in Status Quo (SQ) if it does not happen. Thus, If OPP chooses P, the cabinet member (CM) faces the NCM in Congress—that is, a payoff of 0—against a payoff of 2. Consequently, in this game, there is one strategy that captures the Subgame Perfect Nash Equilibrium: (SPNE) [(P), (CM-S), (NCM-R), (CM-R*)].

This strategy shows that the best option for a cabinet member facing an NCM proposal would be to resign after surviving the first NCM attempt.Footnote ⁵ It also considers that this would happen if the CM did not have proper support from the median legislator of the ruling party coalition.Footnote ⁶ Additionally, in response to a policy shock, the opposition legislator has the first-mover advantage in determining the direction of the game.Footnote ⁷ In that sense, I derive the following hypothesis:

On the basis of the outcome of this game, one could argue that the resignation of the cabinet member provides subtle incentives for opposition legislators to highlight the incumbent government’s ineptitude in specific policy areas. However, considering the regime-type setting in which the NCM is proposed, it is relevant to include some analytical elements of presidential systems that might affect the oversight relationship between Congress and the executive power. These are the time constraints (Linz Reference Linz1990) reflected in the honeymoon period and the electoral calendar (Chaisty et al. Reference Chaisty, Cheeseman and Power2014), and the strength of the ruling party coalition in Congress, built on a strategy of the cabinet portfolio location (Shugart and Carey Reference Shugart and Carey1992; Mainwaring and Shugart Reference Mainwaring and Shugart1997; Amorim Neto Reference Amorim Neto2006; Cheibub Reference Cheibub2007; Alemán and Tsebelis Reference Alemán and Tsebelis2011; Kellam Reference Kellam2015; Mejía-Guinand et al. Reference Mejía-Guinand, Botero and Solano2018; Silva and Medina Reference Silva and Medina2022). In that sense, I derive the following hypotheses:

Moreover, cabinet members are appointed by the president and represent the executive power. Therefore, if a cabinet member faces an NCM, they must gather majority support in Congress or resign. Presidents often appoint nonpartisan cabinet members to implement policy in order to avoid the risk of agency loss (Martínez-Gallardo and Schleiter Reference Martínez-Gallardo and Schleiter2015). However, their lack of partisanship makes them easy targets for opposition parties. Thus, one would expect nonpartisan cabinet members to be challenged politically more than partisan members. Therefore, I propose the following hypothesis:

Although scholars have analyzed the effects of NCMs in parliamentary systems, which are primarily related to policy shocks (Popping and Wittek Reference Popping and Wittek2015; Williams Reference Williams2016), the critical assumptions asserted here also demonstrate that policy shocks and contextual factors in presidential systems limit the effect of horizontal accountability mechanisms over ministerial turnover. The substantive contribution of this inquiry is to shed light on how policy shocks and factors concerning the timing of NCM implementation in Congress, cabinet member partisanship, and party coalition cohesion in Congress, bolstered by a strategy of cabinet portfolio allocation, matter in NCM execution, which directly affects cabinet member instability in presidential systems.

Research Design

The analysis uses the cases of Colombia and Peru to test the effects of NCMs on cabinet instability in presidential systems, based on the formal model and the scope conditions of presidential regimes that include NCMs as a horizontal accountability mechanism for the executive branch. This inquiry adopts a most-similar research design. Colombia and Peru were selected because these countries share some scope conditions concerning historical linkages and state weakness (Mauceri Reference Mauceri2001). Still, these countries differ primarily in their institutional polity structure that shapes executive-legislative relationships.

To be clear, although the Colombian polity is considered a presidential system, Peru is ruled through a presidential system that counts parliamentary elements in its polity. On the one hand, Colombia’s political system is a moderate presidential regime with a demanding bicameral legislature. Presidents are elected for four-year terms and were allowed two terms from 2005 to 2015.Footnote ⁸ Congress is a bicameral legislature comprising a senate and a house of representatives.Footnote ⁹ Congress members are elected for four-year terms and allowed unlimited reelection.

On the other hand, some scholars classify the Peruvian political regime as semipresidential (Elgie Reference Elgie2011). However, the Peruvian institutional makeup does not comply with all the requirements to be categorized as a semipresidential system. According to Duverger (Reference Duverger1980), three main features are required for a political regime to be considered a semipresidential system: the president is elected by universal suffrage, the president possesses considerable power, and the president has opposite along with them a prime minister and ministers who possess executive and governmental powers and can stay in office only if the parliament does not demonstrate opposition to them. The Peruvian polity adheres to the first two requirements but not the last one—also known as cohabitation—in which the president and the prime minister may belong to opposing parties or party coalitions (Hellwig and Samuels Reference Hellwig and Samuels2008). Therefore, I argue that the Peruvian polity is a special case of presidentialism with parliamentary features. Let us analyze those elements in turn.

The 1993 Peruvian Constitution included some elements of the parliamentary system, such as the creation of the position of prime minister (also known as premier), the inclusion of horizontal accountability mechanisms (i.e., the proposal of NCMs against cabinet members), the declaration of permanent moral incapacity against the president, and the procedure of interpellation and dissolution of Congress.Footnote ¹⁰ In this polity, the president chooses the premier instead of the popular vote and is in charge of coordinating cabinet portfolios and executive power policy actions, making the Premier as Super Minister. In that sense, I agree with other scholars that the president’s extensive power over policy execution, fixed term of mandate, and cabinet member appointment power indicate a presidential system. Thus, Peru’s institutional makeup concerning NCMs is unique among other presidential systems, making it an interesting case to compare and analyze based on the proposed theory.

In that regard, one could ask why NCMs are sometimes successful in Peru but not in Colombia. Using the case study methodology suggested by Van Evera (Reference Van Evera2016), I defined the temporal space of analysis for each country from the dates their current constitutions were established until 2021 (i.e., 1991–2021 for Colombia, 1993–2021 for Peru). I also organized information for the presidential terms during these periods. Considering that both constitutions incorporate NCMs as horizontal accountability mechanisms, one could argue that the emergence of policy shocks facilitates the strategic use of NCM mechanisms in those polities. Therefore, I evaluate the empirical support of my theoretical expectations based on cabinet member instability in Colombia and Peru.

This inquiry is subject to some limitations. Despite incomplete reporting from the official legislative websites, I used primary and secondary data gathered from them, along with news reports, to track NCM initiatives in Colombia and Peru. However, information concerning legislators’ choices given an NCM proposal was unavailable. Still, secondary data resources detailed the policy shocks and triggers for the NCMs. I also consulted academic literature in Spanish that highlighted constitutional constraints. Of the 29 NCM initiatives from Colombia, zero passed, and 7 led to the cabinet member’s resignation. However, in Peru, of the 40 initiatives tracked, 4 NCMs were approved, and 10 led to the cabinet member’s resignation (see appendixes 1 and 2 for data details).

This research explores the relationship between the occurrence of NCMs in Congress and their effect on minister turnover. The dependent variable proposed here is Cabinet member instability, which can arise in two scenarios: resignation of the questioned cabinet member or dismissal after NCM approval in Congress. The main explanatory variable is the occurrence of an NCM, as they are horizontal accountability mechanisms, or tools in the oversight process between official institutions—such as legislatures, judicial branches, ombudspersons, and general prosecutors—who control the abuse of power by other branches (O’Donnell Reference O’Donnell1998).

This inquiry uses process tracing to test the proposed theory. Process tracing helps identify the mechanisms between the independent variable and the outcome of the dependent variable (George and Bennett Reference George and Bennett2005). Additionally, this qualitative method reliably tests theories generated from other research methods, including formal models—as argued by Lorentzen et al. (Reference Lorentzen, Taylor Fravel and Paine2017). Based on the scope conditions and the information gathered on NCMs in Peru and Colombia, I contrast evidence to assess each proposed hypothesis as a means of triangulation. The analysis of process tracing in both country cases helps gain inferential leverage concerning observable implications reflected in the contextual elements affecting the use of NCMs against cabinet members in presidential systems. Let us analyze both cases in turn.

The Limited Effect of NCMs in Colombia: Transactional Presidency and Party Fragmentation

NCM proposals by opposition legislators in Colombia are not always effective because some factors limit their execution. These are the strategic use of legislative cooptation actions by the executive power to ensure governance, the continuous tendency toward fragmentation in Colombia’s party system, the timing of the legislature, and the strict requirements for NCM approvals. To understand how these elements concerning the use of NCMs interact, I will clarify how contextual dynamics affect the proposal and unfolding of NCMs against cabinet members in Colombia’s political system.

Colombian presidents have moderate legislative powers leading to legislative cooptation, adopted in 1991 (Duque Daza Reference Duque Daza2015b). Nevertheless, the president relies heavily on “collaborative” relationships in Congress to approve policies on their agenda (Carroll and Pachón Reference Carroll, Pachón, Alemán and Tsebelis2016). Cabinet portfolio allocation is strictly the president’s decision, following a “bait and switch” logic (Guinand and Botero Reference Mejía-Guinand and Botero2017). The president allocates portfolios to cabinet members of their party coalition to ensure their power in Congress and limits partisan ministers’ abilities to affect policy by modifying their office, mitigating agency loss risk (Mejía-Guinand et al. Reference Mejía-Guinand, Botero and Solano2018). This partisan allocation is generally a successful strategy for the executive power to advance its legislative initiatives.Footnote ¹¹

Every four-year legislative term is made up of four annual periods. Legislative years are divided into two periods of Congressional activity: July 20–December 16 and March 16–July 20. No new legislative action can be processed outside of these two periods. There is an old saying about how the balance of power between the legislative and the executive party shifts during each legislative period:

These shifts in power throughout legislative periods highly influence NCM timing by opposition legislators.

Due to a fragmented party system, Colombian politics is highly influenced by informal institutions, such as clientelist strategies and pork-barrel politics (Kugler and Rosenthal Reference Kugler, Rosenthal and Alesina2005). Research suggests that the Colombian party system has shown symptoms of electoral volatility and deinstitutionalization over time (Albarracín et al. Reference Albarracín, Gamboa and Mainwaring2018), including low partisan attachment among citizens, high decentralization of the political parties (Dargent and Muñoz Reference Dargent and Muñoz2011), the formation of cartel parties (Castañeda Reference Castañeda2018), and the use of party-switching strategies by congress members to remain in the government coalition (Illera Cajiao and Buchely Reference Cajiao, Andrés and Fernanda Buchely2015).

Colombia’s highly fragmented party system works because the president negotiates with coalition parties for political support of the policy agenda. The changes that allowed for the modification of presidential reelection rules in 2000 and 2015 are examples of this strategy at work. This quid pro quo strategy is rewarded through different cabinet portfolios, diplomatic assignments, contracts, and local and regional investments, among other formal and informal incentives. Thus, NCM failures are not surprising, due to the informal institutions influencing their approval process. Therefore, I argue that there is always an incentive for opposition legislators to propose NCMs, despite their inefficacy as a direct horizontal accountability mechanism to limit executive power when a policy shock emerges.

Since 1991, Article 135.9 of the Colombian Constitution has stated the requirements for proposing and approving NCMs. NCMs may be proposed in the event of policy shocks related to ministerial cabinet portfolio mismanagement or a member’s negligence in responding to a legislative subpoena. After an NCM proposal, congressional leadership must schedule the public hearing with no fewer than five days’ notice. The cabinet minister must also answer a written questionnaire sent by the general secretary of the Senate or the House of Representatives before the hearing. Voting is scheduled first in the house in which it was proposed between the third and tenth days following the end of the NCM debate in Congress (Senado de la República de Colombia 2021). In the event of an affirmative vote, the member will be relieved of their functions.

A constitutional amendment in 2007 made the approval of NCMs more attainable by modifying the majority required for approval while removing the ability to propose new motions on matters from previously rejected NCMs. Before 2007, NCM approvals required an absolute majority in both legislative chambers, making them almost impossible to pass (Duque Daza Reference Duque Daza2015a). If an NCM were rejected, a new motion could be proposed on the same matter if supported by new facts. Since the amendment, NCM approvals now require a simple majority (one-half plus one) of the proposing legislative chamber. However, a new NCM cannot be proposed on the same matter if the motion is rejected, regardless of new evidence. One could argue that NCM proposals in Colombia have a limited effect on the instability of cabinet members, due to the aggregate endogenous limitations provided by their institutional design, as seen in the timing of the legislatures and the internal approval procedure.

As such, it would be easier for a camel to pass through the eye of a needle than for an NCM to be approved in Colombia’s Congress if the executive power supports the ruling party coalition in the legislature. There are several obstacles to the successful removal of a cabinet member through NCMs, including institutional design elements, the transactional relationships between the legislative and executive powers, and the fragmentation of Colombia’s party system. The need to negotiate with the party coalition to maintain political stability in a highly fragmented party system is inevitable for the executive power. However, in the context of a policy shock, using NCMs is an effective strategy for opposition members because NCMs raise public awareness of policy issues. If those NCMs are implemented strategically, they can result in leadership changes in those cabinet portfolios.

The Effects of Using NCMs in Peru: The Sum of a Strong Presidency, Cooperative Portfolio Allocation Strategy, and a Collapsed Party System

The inclusion of parliamentary elements disencumbers the efficacy of NCMs in Peru’s presidential system. In Peru, the president is the head of the executive branch and shares power with Congress, making a cooperative relationship necessary to achieve policy change. The president has exclusive rights over budgetary and economic policies to initiate ordinary bills through decrees, propose constitutional amendments and referendums, dissolve Congress (if Congress denounces the Council of Ministers twice), declare a state of siege, and demand an expedited prioritization of presidential initiatives in Congress, among other constitutional prerogatives (Ponce Reference Ponce, Alemán and Tsebelis2016).

Some parliamentary system features in Peru give Congress a significant role in the agenda setting of the executive power. Each time the premier and cabinet members are officially appointed, they must go to Congress for a confidence vote on their government plan. NCMs are used as accountability mechanisms to regulate executive power. For that reason, Peruvian presidents must consider executive-legislative relationships when making cabinet appointments.

Peru’s unique polity and its collapsed party system change the role that Congress plays in the setting of horizontal accountability mechanisms. The Peruvian Congress is a unicameral body of 130 seats, assigned to each region corresponding to its population. Legislators serve five-year terms and can be reelected indefinitely. Elections for Congress coincide with presidential elections. The new Constitution of 1993 by the Alberto Fujimori administration (1990–2000) created self-reinforcing mechanisms, in which politicians are elected without party affiliation (Ponce Reference Ponce, Alemán and Tsebelis2016), making them political agents free from party ties and creating a highly volatile electoral system. Thus, personalistic parties or “coalitions of independents,” the participation of outsiders in elections, the use of party-switching strategies by congress members to remain in power, and the hiring of freelance “operators” as a substitute for party organizations, among other practices, have become standard features of this polity (Levitsky Reference Levitsky and Mainwaring2018).

In this way, a cooperative and nonpartisan portfolio allocation strategy benefits the executive branch of the Peruvian polity. Considering that party coalitions are informal and short-lived, the president bargains for appointing single ministers rather than grouping ministers with other political and economic actors and interest groups to govern and implement policy efficiently. The president appoints nonpartisan ministers to key positions, such as the minister of finance, to avoid agency loss and to obtain feasible policy outcomes (Vera and Carreras Reference Vera and Carreras2017).

Many aspects of the hyperpersonalization of Peruvian politics make cabinet members particularly vulnerable during policy shocks. Majoritarian electoral rules and electoral volatility, which lead to the collapse of the party system, incentivize the election of presidents who adopt median positions. Therefore, presidents use strategies to guarantee political stability, such as supporting median legislator bills (Ponce Reference Ponce, Alemán and Tsebelis2016) and using legislative cooptation strategies (i.e., competing informal institutions). Median legislative support decreases and executive-legislative conflict increases when an independent politician or outsider holds the presidency (Carreras Reference Carreras2014), making cabinet members more vulnerable to NCMs. Thus, policy shocks provide several incentives for opposition legislators to propose NCMs.

The Peruvian Constitution established NCMs in 1867. Still, in Articles 132 and 133 of the 1993 Constitution, NCMs are explained as follows: the NCM must be targeted against the premier or any other cabinet minister; it must be supported by at least 25 percent of the legal number of congress members; and it requires three days of study before voting between the fourth and tenth day after its official presentation in Congress. A simple majority approves NCM proposals in the legislative chamber. If an NCM is approved, Congress removes the cabinet member (Romero Herrera Reference Herrera and Yareth2019). If the targeted minister is the premier, it could lead to a cabinet ministerial crisis—the complete resignation of the entire cabinet (Gobierno del Perú Reference del Perú2021). However, if the targeted cabinet minister resigns before Congress votes on the NCM, the NCM would be taken off the day’s legislative agenda.

In this polity, it is important to distinguish between an NCM and a vote of confidence. The latter is a political move in which a cabinet minister stakes their position on Congress’s adopting a particular policy decision. Therefore, when a cabinet member uses this mechanism and does not get approval in Congress, they could lose their position permanently (Cairo Roldán Reference Cairo Roldán2015). In Peru, if an NCM is approved or a vote of confidence is denied in the same executive administration, the president can dissolve Congress and call for new congressional elections within four months after its dissolution, except, according to the Constitution, in Congress’s last year of the 4-year legislative term office (Gobierno del Perú Reference del Perú2021). Hence, Peruvian political dynamics require a functional relationship between the executive and legislative powers.

NCM proposals by opposition legislators in a policy shock context in Peru significantly affect the cabinet’s instability. The main effect of NCMs is to draw attention to the government’s incompetence in managing policy shocks and to demand changes in the leadership of the cabinet portfolios, including the premier. Still, Congress must execute this horizontal accountability mechanism strategically because the president can use veto power to dissolve Congress. Thus, cabinet member resignations are effective alternative outcomes of NCMs considered in this analysis.