Most democrates are against gay marriage.
Marriage laws have always been at the state level, never the federal level. Of course, this was originally because some states didn't recognise inter-racial marriages... But that has always been the problem.
btw, MOST people (7x%) are for some kind of civil union.
I personally think the government should only give out civil union licenses... And church's should give out marriage certificates. Thats where I see the difference.