Megyn Kelly’s lunch may have backed up when she heard President Joe Biden’s latest confession. After sources claimed the leader of the United States, 81, has previously told aides the key to his lasting marriage to First Lady Jill Biden was “good s–,” the journalist, 53, expressed her disgust over the alleged remark. “We’ve got to talk about Joe Biden’s s– life… I just threw up a little my mouth… Ew!” Kelly said in the most recent episode of her “The Megyn Kelly Show” podcast. “I can’t even believe… Is this rehab? What’s happening here? Why was this told?” she continued. “Next thing you know…