Social media has a complicated relationship with democracy. Although social media is neither democratic or undemocratic, it is an arena where different actors can promote or undermine democratization. Democracy is built on a foundation of norms and trust in institutions, where elections are the defining characteristic of the democratic process. This chapter outlines two ways disinformation campaigns can undermine democratic elections’ ability to ensure fair competition, representation, and accountability. First, disinformation narratives try to influence elections, by spreading false information about the voting process, or targeting voters, candidates, or parties to alter the outcome. Second, disinformation undermines trust in the integrity of the electoral process (from the ability to have free and fair elections, to expectations about the peaceful transfer of power), which can then erode trust in democracy. Prior work on social media has often focused on foreign election interference, but now it’s important to realize electoral disinformation is increasingly originating from domestic, not foreign, political actors. An important threat to democracy thus comes from within — namely, disinformation about democratic elections that is being created and shared by political leaders and elites, increasing the reach and false credibility of such false narratives.