Attorney general Jeff Sessions resigned at President Donald Trump’s request just one day after the midterm election.

Sessions’ departure has been forecast by news outlets for months. Matthew Whitaker, his chief of staff, will take over until a replacement is selected and approved by the Senate.

“I have been honored to serve as attorney general and have worked to implement the law enforcement agenda based on the rule of law that formed a central part of your campaign for the presidency,” Sessions wrote in his resignation letter.

Trump grew to dislike Sessions shortly after his nomination when he recused himself from the special counsel investigation into Russian meddling in the 2016 presidential election. Nevertheless, Trump publicly thanked him for his time in the administration after his resignation.

“We thank Attorney General Jeff Sessions for his service, and wish him well!” Trump tweeted. “A permanent replacement will be nominated at a later date.”