If Kavanaugh is confirmed, Trump would fulfill campaign promises to conservative voters that were instrumental in cementing his political coalition and will go down in history as the President who gave the conservative movement its Supreme Court.
"Regardless of what you think about the allegations, the way he reacted to the questions presented doesn't show he has the right temperament", she said of Kavanaugh's testimony.
An woman expresses support for Christine Blasey Ford, the university professor who has accused U.S. Supreme Court nominee Brett Kavanaugh of sexual assault in 1982voutside U.S. District Court in Washington, Oct. 4, 2018.Activists hold a protest march and rally in opposition to U.S. Supreme Court nominee Brett Kavanaugh near the U.S. Capitol, in Washington, Oct. 4, 2018.
"We regret that we feel compelled to write to you, our Senators, to provide our views that at the Senate hearings on September 27, Judge Brett Kavanaugh displayed a lack of judicial temperament that would be disqualifying for any court, and certainly for elevation to the highest court of this land".
The FBI probe, triggered after Mr Kavanaugh and Prof Ford delivered emotional testimonies on Capitol Hill last week, reportedly talked to nine people, including Ms Ramirez. "I might have been too emotional at times", he wrote in the op-ed headlined "I am an Independent, Impartial Judge".
Trump's fellow Republicans hold a 51-49 majority in the Senate, meaning that if all Senate Democrats oppose Kavanaugh, Trump can not afford to lose more than one Republican vote for his nominee, with Vice President Mike Pence casting a tiebreaking vote.
The FBI report represented the latest twist in a pitched political battle over Kavanaugh, and comments by two crucial Republican senators - Jeff Flake and Susan Collins - indicated it may have allayed concerns they had about the judge.
But Democratic Senator Dianne Feinstein said the FBI report was "the product of an incomplete investigation", saying key corroborating witnesses had been snubbed.
Kavanaugh's nomination has become a flashpoint in the #MeToo movement against sexual harassment and assault. Six of the witnesses involved Ford's claims, including an attorney for one of them, and four were related to Deborah Ramirez, who has asserted that Kavanaugh exposed himself to her when both were Yale freshmen. "From their own public statements, we knew that to be false, and nothing in this report changes that".
Last week Blasey Ford testified before lawmakers - and more than 20 million Americans watching live on television - that Kavanaugh attacked her in 1982, when they were both teenagers.
"I will be voting no on Judge Kavanaugh", she said. "That is because I forcefully and passionately denied the allegation against me. That's the only thing I remember", the president said to cheers and applause from the crowd, CBS News reported. Only senators and authorized staff will be able to read them.
According to the summary of the report, Federal Bureau of Investigation agents interviewed 10 people and reached out to 11. Mr Kavanaugh and Prof Ford were not interviewed.
The judge says also said the high court "must never be viewed as a partisan institution".
On Kavanaugh, Heitkamp told WDAY, a TV station in Fargo, "the process has been bad, but at the end of the day you have to make a decision and I've made that decision".
Schumer said he disagreed with Grassley's assessment that there is "no hint of misconduct" but declined to elaborate or take questions.