 The remarks on Wednesday were a stark acknowledgement of fatigue from the 81-year-old president during a meeting intended to reassure more than two dozen of his most important supporters that he's still in command of his job and capable of mounting a robust campaign against former President Donald J. Trump. So he said he needs more rest. He said that he had too much extensive foreign travel. That's really the problem. That he had a cold, of course. After Governor Josh Green of Hawaii, a physician, asked Biden questions about the status of his health, Biden replied his health was fine. Quote, it's just my brain, he added.