When your party is flailing, what can you do? Switch sides, of course.
It looks like there’s a schism in the Republican Party where it comes to their stance on abortion. The last election went poorly and now some of them are rethinking whether they should be making abortion into a big issue at all. Future elections could possibly turn in their favor should they include one less hard-line element in their campaigns. The man making the biggest stink about it is Senator John McCain, although not all of his fellow party members are pleased with this.