That's one of the reasons that the Independent party has grown so large. When we start hearing supposed Republicans telling us we should vote for so and so because he is the supposed unbeatable Republican, even though he is far left of 90 percent of conservative ideals, then its time to start another party.
At this point I honestly do not think the Republican party will ever get back to its roots, just too many people claiming to be Conservatives to get the vote and then turning left after the elections. I could be wrong, in fact I hope I am, but I see a breakup being the only workable idea right now.