 If the question about Joe Biden is, does he have the stamina and mental capacity to be president of the United States? A four-minute demagogic speech in which he barely appears to be being held up by strings like a marionette. Jill Biden apparently is above him with the actual marionette strings. Sorry, Dr. Jill Biden. She's a doctor. Dr. Lady Macbeth Jill Biden. That's not going to answer any questions. But Joe Biden comes out. And again, dual goals. One is to show that he's still alive.