Because he’s the anti Rombama.
He is not a part of the establishment, in the club, it’s all about the Party crowd.
He is conservative and Rove is a statist/liberal. He wants Romney in the White House because he can be controlled, he will not rock the boat and leave the big gov. apparatus intact so the establishment can have their turn back in power again. The only thing missing from Karls attacks claims the barbarians are at the gate with pitchforks and torches. Piss on the elites of both parties—traders.
Cain cares more about the country than he does Rove and the establishment/elites and it scares the crap out of them because he plans on doing what he says which means they are out of power as much as the liberals in the democrat party.