Addressing questions from reporters at the White House on Wednesday, Press Secretary Karine Jean-Pierre once again attributed President Joe Biden’s disastrous debate performance to jet lag following travel and a cold. “He had a schedule that was rigorous, the travel he had to do, going from Italy all the way to the west coast,” said Jean-Pierre. “I think, that can have a toll on anyone, whether you’re 20 or 80.” Most people don’t get to travel in as much relative comfort as the president of the United States—there’s a bed on Air Force One, after all—but yes, it’s true that travel can be exhaus…