American politics is increasingly defined by a two party system where one party, albeit imperfectly and generally not easily, reflects the racial, ethnic and other diversity, tensions and strength that is central to 21st century America, while the other is increasingly simply a party of white, heavily Christian Americans. Today Americans who are non-white, non-Christian or non-straight are far more likely to be Democrats than Republicans. This is true at the level of ordinary voters, grassroots activists and elected officials.