Senate Republicans on Wednesday called on President Trump to stop talking about Christine Blasey Ford after he openly questioned her account and imitated her during a rally Tuesday night.

The comments come as the FBI nears completion of the investigation into Judge Brett Kavanaugh and the Senate readies to vote on his nomination to the Supreme Court.

“I wish he would just stay out of it,” said Sen. Orrin Hatch, R-Utah, who sits on the Senate Judiciary Committee. “He really should stay out of it. The principals are very capable of things.”

Sen. John Thune, R-S.D., echoed Hatch. “I just wish he would not do that,” Thune said.

The president’s remarks came during a rally in Mississippi on Tuesday night after nearly a week of outspoken support for Kavanaugh and pledging to back him in the face of allegations of sexual misconduct.

“‘I don’t know. I don’t know.’ ‘Upstairs? Downstairs? Where was it?’ ‘I don’t know. But I had one beer. That’s the only thing I remember,’” Trump said while impersonating her.

“I don’t remember,” he said multiple times. The crowd also laughed at the president’s comments of Ford.

Key Republicans who will decide the fate of Kavanaugh's nomination, Sen. Jeff Flake, R-Ariz., Sen. Susan Collins, R-Maine, and Sen. Lisa Murkowski, R-Alaska, all blasted the president’s remarks. Flake called them “appalling,” adding that they won’t affect how he votes, while Collins said they were “plain wrong.”

[Related: Bipartisan backlash to Trump mocking Kavanaugh accuser Christine Blasey Ford]

Those three, along with three red-state Democrats, including Sen. Joe Manchin, D-W.Va., and Sen. Heidi Heitkamp, D-N.D., hold the keys to the nomination.

Other GOP senators claimed they had not seen the president’s comments from the rally.

“I don’t know what he had to say, to tell you the truth,” said Sen. Roy Blunt, R-Mo. “I suppose I should try to find out.”