You'll find that once you get out of the BosWash back east necks get red pretty fast, the whole deal about Pennsyltucky comes to mind, and you'll find most of upstate NY is pretty Republican.
And California got caught up in the votes, the court fights, the fights in the legislature and all that precisely because SF started doing it in 2004, kicking the whole thing off. And, again, it only lost on the ballot because of religious types from out of state gave huge amounts of money to skew the election in 2008. But, because of that, it's unlikely that any state is ever going to get to ban it by election, so there is that. And, when the Cali fight is done this year, the SC is going to have to uphold it, and that's going to be the end of DOMA too.