 Is the chief caregiver in chief. Here's a little clip from Peter Doocy with Corinne Jean-Pierre about Jill Biden. President Biden is the oldest president in U.S. history. Why does White House staff treat him like a baby? No one treats the president of the United States, the commander in chief, like a baby. So there's this book that says when staff come back. Joe, you did such a great job. You answered every question. You knew all the questions.