From Andrew Sullivan:

We have seen, and not for the first time, how using fear of a minority can be so effective a tool in building a political movement. The single most important issue for Republican voters, according to exit polls, was not the war on terror or Iraq or the economy. It was "moral values." Karl Rove understood the American psyche better than I did. By demonizing gay couples, the Republicans were able to bring in whole swathes of new anti-gay believers into their party. With new senators Jim DeMint and Tom Coburn, two of the most anti-gay politicians in America, we can only brace ourselves for what is now coming.