George Bush today announced that he would be seeking a constitutional amendment, to block gay marriage. He stated that he wanted to preserve marriage in its current state.

I know that there's another forum topic about Homosexuals and whether they should be able to get married, but I want to discuss the actual reasons behind his decision. Because, frankly, I'm outraged. I don't understand this-I equate this comment with racism-it's disgusting.
I have heard ramblings about how he is using this to put the Democrats in a tight spot over this subject during the upcoming Presidential Election. I was under the impression that the Republican Party was between right wing and centre-right. This is a fascist policy.

I don't see how this puts him in a good position against the democrats. Surely there is support for gay marriage in America?

edit: I'm a Liberal Democrat supporter (they're a British Centre Left party).