Literature on descriptive representation finds that voters evaluate representatives who share their race or gender more positively. A largely separate literature on polarization demonstrates that Democrats and Republicans have increasingly divergent attitudes about identity and representation. I build on both literatures to argue that the effect of representatives’ racial and gender identities on constituent evaluations now varies more by party than by constituents’ own ascriptive identities. Applying a difference-in-differences design to 2008-2020 CCES data, I find that Democratic respondents increasingly approve more highly of Members of Congress who are women or people of color, whereas Republicans’ approval has remained unrelated to Member identity. Among Democrats, representatives’ identities also act as a partial substitute for ideological representation, meaning they give more ideological leeway to representatives from historically marginalized groups. In sum, partisan polarization of attitudes towards identity and representation has altered classic patterns of how constituents evaluate representatives.