When Gov. Sarah Palin was deciding whether or not to get into the presidential race, Karl Rove was popping up on Fox News to talk about why her skin was too thin for the job. And when Gov. Rick Perry was thinking about his entrance into the race, Rove was Johnny-on-the-spot with reasons why a Perry candidacy would not be viable either. Now Rove’s moved on to Herman Cain, whose candidacy he’s doing all he can to sink, sidetrack, or otherwise derail.