Senate Democrats up for reelection this year in deep-red states face a nightmare decision on how to handle Supreme Court nominee Brett Kavanaugh.

Vulnerable Democrats are hoping Republicans will force him to withdraw his nomination, allowing them to avoid politically divisive votes.

The Democrats in the toughest position are Sens. 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 (N.D.), Joe Donnelly Joseph (Joe) Simon DonnellyTrump meets with potential Supreme Court pick Amy Coney Barrett at White House Names to watch as Trump picks Ginsburg replacement on Supreme Court Momentum growing among Republicans for Supreme Court vote before Election Day MORE (Ind.) and 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 (W.Va.).

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Heitkamp and Manchin are undecided, and both are seeking another six-year term in states that Trump won by double digits in 2016. Donnelly is in much the same boat but said on Friday that he would

vote "no" on Kavanaugh

.

All three voted for 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 first Supreme Court pick, Neil Gorsuch, in 2017.

But this time around the partisan divide is much more bitter: The seat Kavanaugh has been tapped to fill will likely determine the balance of the court for years, and a confirmation vote is slated to take place a month before Election Day.

The Democratic base is much more fired up about Kavanaugh than it was about Gorsuch, who was confirmed in April 2017.

Liberal activists staged a sit-in Monday at Manchin’s campaign office in West Virginia in an effort to pressure him to vote against the nominee.

One Democratic senator, who requested anonymity, said there’s hopeful talk within the Senate Democratic Caucus that Kavanaugh will drop out, even though he has adamantly vowed to stay.

The lawmaker said Senate Democratic Leader Charles Schumer Chuck SchumerSenate Democrats introduce legislation to probe politicization of pandemic response Schumer interrupted during live briefing by heckler: 'Stop lying to the people' Jacobin editor: Primarying Schumer would force him to fight Trump's SCOTUS nominee MORE (N.Y.) is urging undecided centrist Democrats to wait until three undecided Republicans — Sens. 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), 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 (Alaska) and 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.) — make their positions known.

“He’s telling them, ‘Keep your powder dry.’ That means you don’t have to decide this — wait and see how it plays out. There’s some speculation that Kavanaugh may not last,” the lawmaker said. “They always vow to stay right until they don’t.”

A second Democratic senator said there’s widespread disbelief in the caucus that Kavanaugh is holding on.

“I just had a conversation with a colleague who said they couldn’t believe he hasn’t dropped out yet,” the second lawmaker said Monday evening. “There was a time he could have done it gracefully and could have protected the Supreme Court.”

The lawmaker said whether Kavanaugh keeps fighting “depends on what else the FBI finds and where the votes are” but observed that “public opinion is trending against him after his testimony Thursday.”

A Harvard CAPS/Harris poll released exclusively to The Hill on Monday found that 37 percent of registered voters want their senators to give Kavanaugh’s nomination the thumbs up, while 44 percent want them to vote down Trump’s nominee.

Eighteen percent of respondents were undecided in the survey conducted from Sept. 29 to 30, two days after Kavanaugh and Christine Blasey Ford appeared before the Senate Judiciary Committee to give testimony regarding her allegation that Kavanaugh sexually assaulted her at a party in 1982, when they were both in high school.

One previously undecided Democrat, Sen. Jon Tester Jonathan (Jon) TesterPence seeks to boost Daines in critical Montana Senate race This World Suicide Prevention Day, let's recommit to protecting the lives of our veterans Filibuster fight looms if Democrats retake Senate MORE (Mont.), who is up for reelection in a state Trump won by 20 points, came out against Kavanaugh the day after the nominee’s angry rebuttal of Ford’s allegation.

Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellPelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Senate GOP aims to confirm Trump court pick by Oct. 29: report Trump argues full Supreme Court needed to settle potential election disputes MORE (R-Ky.), however, said he will force vulnerable Democrats to vote on the nominee.

“The time for endless delay and obstruction has come to a close,” he said on the floor Monday. “We’ll be voting this week.”

Kavanaugh vowed last week to stick it out, no matter what.

“I will not be intimidated into withdrawing from this process,” he declared in his opening statement to the Judiciary Committee.

A day after his testimony, Senate GOP leaders agreed to a request from Flake to delay a Senate floor vote on Kavanaugh to give the FBI time to investigate the allegations against him. That probe is expected to be completed later this week.

Heitkamp suggested at a campaign stop Friday in North Dakota that Trump and GOP leaders could defuse the situation by finding another nominee, who would have just enough time to be confirmed before Congress adjourns for the year.

“There’s a lot of lawyers in America who can sit on the court,” she said in Grand Forks, according to The Associated Press. “I think this idea that there’s only one person that can do this job, we all need to recalibrate.”

Senate aides see Heitkamp as less likely to support Kavanaugh than Manchin because she has a stronger record defending abortion rights. His confirmation could tip the court’s balance against Roe v. Wade, the landmark 1973 decision that established abortion rights nationwide.

Heitkamp may also feel more pressure to believe Ford’s allegation, which has exposed a significant gender divide among the electorate.

A recent USA Today–Ipsos Public Affairs poll showed that 35 percent of women nationwide believe Ford’s accusation, while only 21 percent of men do. Women oppose Kavanaugh 43 percent to 23 percent, while men support him 40 percent to 36 percent.

Donnelly said last week, after Thursday’s Senate hearing, that he would “gladly welcome the opportunity to work with President Trump on a new nominee for this critically important position.”

Manchin has kept in close contact with undecided Republicans during the Kavanaugh debate.

He met with Collins, Murkowski and Flake in a Capitol Hill hideaway after Ford and Kavanaugh testified Thursday and, like them, didn’t give any hint afterward about how he would vote.

“We’re friends. We talk. There’s no decisions on anything. No one told me they made a decision, and we’re all still looking and talking and comparing,” Manchin told reporters after the meeting.

Donnelly said he would oppose Kavanaugh because he didn’t have enough information to assess the allegations against him, though he left himself a little bit of room to support the nominee if the FBI probe fails to turn up any corroborating evidence.

He cited the lack of a supplemental FBI investigation and his own inability “to get all information necessary” as reasons for his opposition.

Donnelly declined to answer a question Monday about whether he would be open to changing his position.

Trump has sent signals that he may now be of a mixed opinion about Kavanaugh.

On Friday he described Ford as “a very fine woman” and “very credible.”

The president on Monday said he was “surprised” at how vocal Kavanaugh “was about the fact that he likes beer and he’s had a little bit of difficulty.”

Trump noted that while he himself never drank, he saw a lot of people drinking in high school.

“They’d drink beer then go crazy,” he said in comments that appeared to undercut the nominee’s defense of his drinking habits.

But Trump also wants red-state Democrats to pay a political price if Kavanaugh goes down.

Trump chewed out McConnell 11 days ago in a private phone call from his golf club in Bedminster, N.J., for letting Kavanaugh’s nomination drag on, according to The New York Times.

The president later told associates that senators should have been forced to vote down Kavanaugh and suffer the political backlash, the Times reported.

But vulnerable Democrats wouldn’t be the only ones put in a tough spot with a floor vote. Collins, Flake and Murkowski, while not up for reelection this year, all have their political futures to consider if the Senate holds a confirmation vote on Kavanaugh.

Flake is retiring from Congress in early January. Collins is up for reelection in 2020, followed by Murkowski in 2022.

Republican candidates running for Senate against red-state Democrats have used Kavanaugh's nomination to go on the attack.

Rep. Kevin Cramer Kevin John CramerMomentum growing among Republicans for Supreme Court vote before Election Day On Paycheck Protection Program, streamlined forgiveness is key McConnell shores up GOP support for coronavirus package MORE (R-N.D.) has called Ford’s accusations “absurd” and criticized Democrats for orchestrating a campaign against the nominee.

“At some point Brett Kavanaugh deserves due process,” Cramer said in a radio interview. “You can’t just stage these allegations to delay the Supreme Court.”

Indiana businessman Mike Braun (R) has accused Donnelly of being “more concerned with standing with his liberal Democrat leaders than standing for Hoosiers.”

West Virginia Attorney General Patrick Morrisey (R), who is running against Manchin, has accused his opponent of being “complicit in Senate Democrats’ disgraceful treatment of President Trump’s Supreme Court pick.”

The Senate Leadership Fund, whose president and CEO, Steven Law, is McConnell’s former chief of staff, highlighted a Republican poll Friday showing that 58 percent of West Virginians support confirming Kavanaugh, while 28 percent oppose him. The survey was conducted by Public Opinion Strategies, a GOP polling firm, for the Judicial Crisis Network, a group that is spending more than $1 million on ads targeting red-state Democrats in an effort to pressure them to support Kavanaugh.

Some Republicans say centrist Democrats will be tempted to seize on any potential failure by the FBI investigation as a reason to vote for Kavanaugh.

“It’s a really terrible vote for them,” said a senior GOP aide.

Manchin on Monday said a lot would depend on the findings of the FBI probe.

“This investigation’s going to tell a lot,” he said.