Romney’s job was to block a conservative from getting the nomination, he could care less what happened after that.
I suppose it was Romney's fault that Bachmann, who was leading, gaffed herself out of the race. Or that Cain, who was leading later, either couldn't control himself or caved under false and easily refuted accusations. Or that the other Conservatives were simply ineffective.
he could care less what happened after that.
I actually agree with that, though not for the reason you meant.