President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE's approval rating among voters who lean liberal has dropped amid the sexual assault allegations surrounding Supreme Court nominee Brett Kavanaugh, according to a new American Barometer survey.

The poll, conducted by Hill.TV and the HarrisX polling company, found that only 12 percent of voters who said they leaned liberal approved of Trump, an 8-point drop from the last American Barometer survey.

Trump's disapproval with the group also increased 8 points, to 88 percent, according to the survey.

The survey, which was conducted on Oct. 1-2, comes as Trump defends his Supreme Court nominee Brett Kavanaugh as he faces three sexual misconduct allegations that have roiled his confirmation process in the Senate.

Kavanaugh has strongly denied all the allegations.

Emily Ekins, polling director at the Cato Institute, told Hill.TV's Joe Concha that the decrease in approval from those who lean liberal could be a result of the controversy surrounding Kavanaugh.

Trump stirred controversy on Tuesday when he mocked Kavanaugh's first accuser, Christine Blasey Ford, at a campaign rally in Mississippi.

Ford has accused Kavanaugh of sexually assaulting her at a high school party in the early 1980s.

"How did you get home?" Trump said. " 'I don't remember.' How'd you get there? 'I don't remember.' Where is the place? 'I don't remember.' How many years ago was it? 'I don't know.' "

"What neighborhood was it in?" he continued, as the crowd cheered and clapped. " 'I don't know.' Where's the house? '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.' "

Ekins said the comments will likely negatively impact Trump's approval rating in the future.

"We're going to have to wait a week or so to see how the polls shake out, especially with President Trump last night mocking Dr. Ford. I think that that's going to have downward pressure on his approval ratings," Ekins said.

The American Barometer was conducted on Oct. 1-2 among 1,000 registered voters with a margin of error of 3.1 percentage points.

— Julia Manchester