CNN’s Wolf Blitzer was not happy with pro-Obama Super PAC head Bill Burton, for running the now infamous “cancer ad.”

“When you do an ad that seems to leave the impression that he was indirectly responsible for a woman dying from cancer, that is so powerful, that is so tough, that goes beyond what you guys should be doing.” Blitzer said.

“In the thousands of stories, some of them are heart breaking, really sad.” Burton answered, standing by the ad. “That doesn’t mean they should necessarily be off limits.”