The GOP is now looking at developing a campaign that , in effect says, "We were for you all the time, we were just testing the courts resolve to back us"
That's actually not too far from the truth. We see that kind of backfilling in the dissents of Scalia and Roberts. Scalia starts off his dissent by stating: "The substance of today’s decree is not of immense personal importance to me." Roberts's argument, in short, is that gays were just on the verge of winning through the political process, and they should feel bad that the supreme court has now taken away their chance to gain a legislative victory.
I think Republican politicians will increasingly take the same approach as Scalia and Roberts. In sum: "gay marriage isn't a big deal to me
, I just think it should have been left to the state legislatures." Jeb Bush is already almost there. I expect other candidates who are not on the lunatic-fundie-right, like Rand Paul and Marco Rubio, will take similar stances.