WASHINGTON (Reuters) – The top Democrat in the U.S. Senate, Chuck Schumer, on Thursday called on President Donald Trump to find a new nominee for attorney general, saying Trump’s current pick cannot be put in charge of the special investigation into alleged election meddling by Russia.

“Since Mr. Barr hasn’t been formally nominated yet, the president must immediately reconsider and find another nominee who is free of conflicts and will carry out the duties of the office impartially,” Schumer said of William Barr, a former U.S. attorney general whom Trump said earlier this month he would nominate to return to the position.