Tingles Call Obama Opponents "Crackers on the Right"

Chris Matthews accuses Obama's critics of "ad hominem" attacks, then launches an "ad hominem" attack on them by calling them "crackers."

From the video:

“So much of this attack on Obama has been ad hominem — directed at the person, the president. Whether it’s somebody, some cracker out there on the right calling him — some birther type that he’s not an American or it is someone a little more sophisticated, but basically saying he’s a socialist”

Matthews calls Obama critics 'crackers'