President Trump in an interview broadcast Sunday said that appointing Jeff Sessions as his first attorney general was his "biggest mistake" in the Oval Office.

"I would say if I had one do-over, it would be I would not have appointed Jeff Sessions to be attorney general," Trump said on NBC's "Meet the Press." "That was the biggest mistake."

Sessions was a top 2016 campaign surrogate for Trump and the first senator to endorse him, but their relationship soured after Sessions recused himself from the investigation into Russia's election interference in 2016, leading then-Deputy Attorney General Rod Rosenstein to appoint special counsel Robert Mueller.

Mueller's report details several occasions in which Trump pressured Sessions to reverse his recusal.

Trump went on to tweet and make public comments indicating he never would have appointed Sessions had he known he would recuse himself.

Sessions resigned as attorney general in November 2018, a day after the midterm elections.