GOP Sen. Susan Collins Susan Margaret CollinsSenate GOP aims to confirm Trump court pick by Oct. 29: report The Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting Senate GOP sees early Supreme Court vote as political booster shot MORE (Maine) on Wednesday said 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 comments on Christine Blasey Ford were “plain wrong,” making her the second swing-vote senator to denounce the president's rhetoric.

“The president’s comments were just plain wrong,” Collins told reporters who were camped outside of an unrelated Senate Aging Committee hearing, which Collins oversees.

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Trump appeared to mock Ford, the first woman to publicly accuse Supreme Court nominee Brett Kavanaugh of sexual assault, during a rally in Mississippi on Tuesday night.

"'How did you get home?'" Trump said, imitating Ford. "'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.'"

Collins is the second undecided Republican senator to criticize Trump’s remarks. Sen. Jeff Flake Jeffrey (Jeff) Lane FlakeJeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Republican former Michigan governor says he's voting for Biden Maybe they just don't like cowboys: The president is successful, some just don't like his style MORE (Ariz.) told NBC’s “Today” that the president's comments were “kind of appalling.”

Kavanaugh remains short of the simple majority needed for him to ultimately be confirmed in the Senate, and Republicans are worried female voters will turn against GOP candidates in the November midterm elections.

Republicans hold a 51-49 majority, meaning they cannot afford to lose more than one GOP senator without needing help from Democrats to confirm Kavanaugh.

Collins, Flake and Sen. Lisa Murkowski Lisa Ann MurkowskiSenate GOP aims to confirm Trump court pick by Oct. 29: report Senate GOP sees early Supreme Court vote as political booster shot Pence defends Trump's 'obligation' to nominate new Supreme Court justice MORE (R-Alaska) are viewed as the Republican swing votes. No Democrats have said they will support Kavanaugh, though Sens. Joe Manchin Joseph (Joe) ManchinThe Hill's Morning Report - Sponsored by Facebook - Trump, GOP allies prepare for SCOTUS nomination this week Trump meets with potential Supreme Court pick Amy Coney Barrett at White House Names to watch as Trump picks Ginsburg replacement on Supreme Court MORE (D-W.Va.) and Heidi Heitkamp Mary (Heidi) Kathryn HeitkampCentrists, progressives rally around Harris pick for VP 70 former senators propose bipartisan caucus for incumbents Susan Collins set to play pivotal role in impeachment drama MORE (D-N.D.) remain undecided.

The Senate is expected to move forward with Kavanaugh's nomination this week upon conclusion of an FBI investigation stemming from the sexual assault allegations against him.