Personally, I think it is a misnomer and misapplication of "marriage", and am mildly opposed to it.
Politically I am largely indifferent and believe we have far more important issues. It is one of the last things I'd consider in a candidate in deciding whether or not to vote for him. I consider economic issues and respect for the Constitution and Bill of Rights far more important in a candidate... I am unlikely to even bother to find out what his views on SSM are.