WASHINGTON – President Donald Trump said the "biggest mistake" of his presidency was picking Jeff Sessions for attorney general.

In an interview that aired Sunday morning on "Meet the Press," host Chuck Todd asked Trump, "If you could have one do-over as president, what would it be?"

To which Trump replied, "It would be personnel," before lashing out at his former attorney general.

"I would say if I had one do-over, it would be, I would not have appointed Jeff Sessions to be attorney general. That would be my one ... that was the biggest mistake."

It's not the first time Trump has openly criticized the former attorney general.

Trump fired Sessions as attorney general the day after the 2018 midterm elections, ending a year of open criticism. Trump had been incensed by Sessions' recusal from overseeing the Mueller investigation and railed against the former Alabama senator as "beleaguered" and "disgraceful," and he expressed "disappointment" in him.

The president told The New York Times in July 2017 that he would not have appointed Sessions if he had known Sessions would have recused himself.

In September 2018, Trump went so far as to tell Hill.TV: “I don’t have an attorney general. It’s very sad.”

Contributing: Kevin Johnson

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