Donald Trump on Wednesday indicated he regrets nominating Jeff Sessions, after the attorney general recused himself from all matters involving the Justice department’s investigation into Russian interference in the 2016 election.

“Sessions should have never recused himself, and if he was going to recuse himself, he should have told me before he took the job and I would have picked somebody else,” Trump said, the New York Times reports.

Sessions elected to remove himself from all things Russia after it was revealed he failed to disclose multiple meetings with Russian ambassador Sergey Kislyak.

“Jeff Sessions takes the job, gets into the job, recuses himself, which frankly I think is very unfair to the president,” Trump said, according to the Times. “How do you take a job and then recuse yourself?”

“If he would have recused himself before the job, I would have said, ‘Thanks Jeff, but I'm not going to take you.’ It’s extremely unfair—and that’s a mild word—to the president,” he added.

Trump has previously expressed frustration with the Russia probe, most notably when he abruptly fired FBI Director James Comey to take pressure off his administration.