We fielded an experiment on a sample of approximately 400 Black state legislators to test whether they would be more responsive to an email that mentioned the National Association for the Advancement of Colored People (NAACP) relative to an email that mentioned Black Lives Matter (BLM). The experiment tested Cohen's theory of secondary marginalization (1999), whereby relatively advantaged members of a marginalized group regulate the behavior, attitudes, and access to resources of less advantaged members of the group. We expected that Black legislators would be less responsive to an email that referenced BLM, an organization that is associated with more marginalized members of the Black community. Contrary to our hypothesis, Black legislators were as responsive to emails referencing inspiration from BLM as they were to emails referencing inspiration from the NAACP. Thus, we do not find any evidence of intragroup discrimination by Black state legislators. To our knowledge, this is the first field experiment to test Cohen's theory of secondary marginalization.1

Cathy Cohen’s (1999) theory of secondary marginalization helps to explain why the needs of some members of Black communities are not prioritized on “the” Black political agenda; indeed, some groups are ignored altogether as mainstream Black public opinion shifts to the right (Tate 2010). However, the contemporary movement for Black Lives calls for an intersectional approach to Black politics. Its platform requires participants to take seriously the notion that since Black communities are diverse, so are the needs of its members. To what extent are Blacks likely to believe that those who face secondary marginalization should be prioritized on the Black political agenda? What is the role of linked fate in galvanizing support around these marginalized Blacks? To what extent does respectability politics serve to hinder a broader embrace of Blacks who face different sets of interlocking systems of oppression, such as Black women, formerly incarcerated Blacks, undocumented Black people, and Black members of LBGTQ communities in an era marked by Black social movements? We analyze data from the 2016 Collaborative Multi-Racial Post-Election Survey (CMPS) to assess whether all Black lives matter to Black Americans.