--- - |2+ Objective To explore whether increases in diversity give partisans immunity from claims of racial prejudice. To assess when individuals are more likely to report racially progressive attitudes when their party is accused of racism and racial representation in the party varies. Method We implement a survey experiment where individuals are told their party harbors either racial or religious prejudice and then are asked to vote on a party primary election in which the race of the candidates varies. Results We find that white Republicans modify their racial attitudes in response to accusations of racism. However, this effect disappears when white Republicans are presented with evidence of racial/ethnic diversity in their party. Conclusion Our results demonstrate that racial/ethnic diversity in one's political party may delegitimize claims of racial bias and minimize these accusations' ability to alter racial attitudes. - Social Science Quarterly, EarlyView.