 He bowed out two days early because he said it was too tiring, even though the debate session started at 11 o'clock in the morning and allowed time for an afternoon nap. We're told by insiders at the White House that Joe Biden's effective working day is from 10 a.m. to 4 p.m. He's in a 24-7 kind of job, and he actually is effective during about one quarter of that time. And that's when he's not on vacation, which is 40 percent of the time.