The most powerful identities in modern politics are our political identities, which have come, in recent decades, to encompass and amplify a range of other central identities as well. Over the past fifty years, our partisan identities have merged with our racial, religious, geographic, ideological, and cultural identities. Those merged identities have attained a weight that is breaking our institutions and tearing at the bonds that hold this country together. This is the form of identity politics most prevalent in our country, and most in need of interrogation.