Two studies examined how perceivers' national identification influences their implicit and explicit attitudes toward White and non-White ethnic groups whose members express their ethnic identity overtly in public or discreetly in private spaces. Results revealed that at a conscious level, White American perceivers' national identification elicited more negative attitudes toward both White and non-White ethnic groups when members embraced their ethnic heritage in public rather than in private. However, at an unconscious level, White perceivers' identification with the national group led to less favorable attitudes toward non-White ethnic groups, but not White ethnic groups, when their group members embraced ethnic identity in public. By integrating research on national identification, ethnic identity expression, and prejudice, the present research highlights some conditions under which majority group members' national identification affects how they perceive ethnic subgroups within the nation. (PsycINFO Database Record (c) 2014 APA, all rights reserved).