As far as Jon Stewart is concerned, establishment Republicans like Karl Rove and John McCain have no right to complain about the Tea Party exploding through the chest of their venerable body, since they basically invited them in.
Remember, John Hurt didn't ask the alien facehugger to impregnate his stomach so he could win an election. He had every right to be a little miffed about what happened. Rove... not so much.
Watch Stewart's take on the Republican Tea Party problem in part one above and part two below.