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.

The exchange of letters, a tradition dating back to Ronald Reagan, continues as Joe Biden left a note for Donald Trump.

A Marine helicopter carrying former President Joe Biden and Jill Biden, flies past the Lincoln Memorial, rear, after lifting from the U.S. Capitol en route to Joint Base Andrews, after the Biden's attended the 60th Presidential Inauguration in the Rotunda of the U.