Amidst discontent over America's growing diversity, many white Americans now view the political world through the lens of a racial identity. Whiteness was once thought to be invisible because of whites' dominant position and ability to claim the mainstream, but today a large portion of whites actively identify with their racial group and support policies and candidates that they view as protecting whites' power and status. In White Identity Politics, Ashley Jardina offers a landmark analysis of emerging patterns of white identity and collective political behavior, drawing on sweeping data. Where past research on whites' racial attitudes emphasized out-group hostility, Jardina brings into focus the significance of in-group identity and favoritism. White Identity Politics shows that disaffected whites are not just found among the working class; they make up a broad proportion of the American public--with profound implications for political behavior and the future of racial conflict in America.