Every president since Ronald Reagan has left a note for his successor, and President Biden could be the first to write a letter to someone who is both his successor and the predecessor who left a note for him.

President Trump found a handwritten letter from outgoing President Biden in the Oval Office’s Resolute Desk, continuing a longstanding tradition of presidential transitions.

Ronald Reagan probably didn't realize he was starting a tradition when he wrote a note congratulating his successor and left it in the Oval Office desk drawer after two terms as president.He did that for George H.