(CNN) - At the American Israel Public Affairs Conference on Monday, Sen. John McCain of Arizona joked that, because of his close friendship with former Connecticut Sen. Joe Lieberman, he observed a lot of Judaism's Sabbath laws.

"I've had to go through all this all these years and I've gotten none of the benefits," McCain told the crowd. "So I'm announcing my conversion to Judaism."

He might've gone through with it, the senator said, but for one little thing...