President Donald Trump wouldn’t rule out investigating former President Joe Biden in a Fox News interview aired Wednesday.

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

Former President Joe Biden left a traditional letter for Donald Trump in the Oval Office on January 20, 2025, expressing well wishes. Biden's letter included a message of hope and guidance for Trump during his presidency.

WASHINGTON — President Trump revealed Tuesday night that former President Joe Biden left him an “inspirational” message before leaving the Oval Office for the last time. “It said ‘To number 47’ and it was a very nice one,” Trump told reporters during a question-and-answer session in the White House’s Roosevelt Room.

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.

"Join me tonight as I reflect on our progress and deliver my farewell address to the nation," President Joe Biden's X account posted, in part, on Wednesday.

Biden was the first president to find himself in the unique position of writing a letter to someone who is both his successor and the predecessor who left him a note four years earlier.

"Maybe we should all read it together," Trump told reporters upon finding Biden's letter. "Maybe I'll read it first and then make that determination."

A letter from former President Joe Biden to President Donald Trump, left in the Oval Office, has been exposed, revealing Mr Biden’s parting words to his successor. Fox News correspondent Peter Doocy obtained the letter left by the former president, reading it aloud to viewers on air.

The letter was dated Jan. 20, 2025, and signed “Joe Biden.” Trump found the letter inside the Resolute Desk in the Oval Office while signing executive orders Monday night.

President Donald Trump revoked a 1965 civil rights executive order Tuesday, rolling back authorities long used to prevent employment discrimination by federal contractors, subcontractors and grant recipients. He also ordered agencies to plan potential civil rights investigations against private sector entities who embrace diversity hiring.