What is clear is that after four contentious years, Biden leaves Washington as a remarkably consequential one-term president.

Every president since Ronald Reagan has left a note for his successor, and President Joe 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.

Ronald Reagan scribbled a note in 1989 to his successor above an elephant cartoon. The tradition, started perhaps inadvertently, was continued by Joe Biden.

Ronald Reagan started a tradition as he prepared to leave office after two terms as president: Write a note congratulating your successor and leave it in the Oval Office desk drawer.

Eerie similarities between Joe Biden's hostage release deal and the deal made with Iran by former President Jimmy Carter do not go unnoticed.

Donald Trump shared details about a 'nice' and inspirational letter former President Joe Biden left for him at the White House Resolute Desk. The letter continues an inauguration tradition initiated by Ronald Reagan.

The coalition collapse that doomed Biden follows a grim precedent set by another Democratic leader: Jimmy Carter.

The rug, which was in place during Ronald Reagan’s administration and during Trump’s first term, was reinstalled during Trump’s inauguration ceremony, according to CBS News. The Resolute Desk had to be partially disassembled in order to facilitate its return.

Read Biden’s farewell letter to Trump in full - Presidential tradition to leave letters for successors began with Ronald Reagan in 1989

After four years of a subdued term under President Joe Biden, 82, Trump has brought energy and unpredictability back to the Oval Office. The former reality TV star and businessman known for his branding, Trump, 78, jump-started his agenda with an eye for dramatics.

WASHINGTON (NEXSTAR) – President Donald Trump told reporters Tuesday that former President Joe Biden wrote him a “nice letter.” As part of an Inauguration Day tradition, the letter was left inside the Resolute Desk at the White House. President Trump found the letter in the Oval Office on Monday night following his inauguration.