By Jeremy Herb - 07/16/13 04:59 PM EDT
The testimony prompted criticism from lawmakers and led to some calls for his resignation over the false testimony.
“I’m troubled by that testimony, obviously,” Levin said at a breakfast roundtable hosted by The Christian Science Monitor.
“How do you hold him accountable? I guess the only way to do that would be for the president to, somehow or other, fire him,” Levin added. “I think he’s made it clear that he regrets saying what he said. I don’t want to call on the president to fire him, although I’m troubled by this.”