Unbelievable. Think Progress has the video up.

“I think we have to be prepared to take aggressive military action against the Iranians to stop them from killing Americans in Iraq,” Lieberman said. Host Bob Schieffer followed-up: “Let’s just stop right there. Because I think you probably made some news here, Senator Lieberman. You’re saying that if the Iranians don’t let up, that the United States should take military action?” “I am,” Lieberman responded.

Lieberman is further right than a lot of Republicans. This guy doesn’t worry about American interests – he worries about the interests of Israel.