My understanding is that he tried to broker a deal with the DE Tea Party to have them support Castle, and was flatly rejected. I'm assuming that (like Murkowksi) he'll do anything to send the message that if you defy the establishment you will be destroyed.
He completely failed politically by advising idiot george to ignore the firestorm of hate that was being set by the democrats even as his feet began to smoke.
He insulted all decent Americans and endangered our country by pushing amnesty, when it was obvious to a blind man on a fast horse that the security of the nation was at stake.
Now, his puny gig with Fox is about up, his worthless book of rationalizations and blame shifting has gone belly up, and he needs a job. He thought he could buy one from Castle as an advisor or some such corrupt bullshit beltway position, but LO! and behold, the rino a-hole got his butt kicked by a real American. Karl Rove, like Tom D'Asshole, is deeply saddened tonoght.