Mr Kavanaugh's confirmation was all but sealed Friday when he won the support of key Senate Republican Susan Collins and conservative Democrat Joe Manchin.
Brett Kavanaugh was sworn in Saturday as US Supreme Court justice following the closest Senate confirmation vote in more than a century, marking a major win for President Donald Trump's drive to move the country's political institutions to the right.
Supreme Court nominee Brett Kavanaugh.
Gillibrand says women who've experienced sexual trauma are "tired of the same old scenario where the men are believed and the women are not".
Collins said on the Senate Floor that she found the testimony of Dr. Christine Blasey Ford, who told the Senate Judiciary Committee that Kavanaugh sexually assaulted her when they were teenagers, to be "sincere, painful, and compelling".
The vote gave Trump his second appointee to the court, tilting it further to the right and pleasing conservative voters who might have revolted against GOP leaders had Kavanaugh's nomination flopped.
"If I were still a member of the U.S. Senate, I would not vote to confirm Judge Brett Kavanaugh to the Supreme Court", Mitchell said in a statement Sunday.
Republicans, with the exception of Sen.
Joe Manchin is facing a hard re-election campaign in West Virginia, a traditionally Republican state that Mr Trump won by a landslide.
While many senators say they were satisfied with the FBI probe, her lawyers say the investigation was insufficient.
She told CNN that Kavanaugh's forceful denial and lack of corroborating evidence brought her back to fundamental issues of due process, a presumption of innocence and fairness. But Susan Rice, who was President Barack Obama's national security adviser, is reportedly considering challenging Collins. Mazie Hirono, a Democrat from Hawaii, who described Collins' remarks as "insulting" to Ford. "What she did was to come forward and testify before the Senate Judiciary Committee and agree to cooperate with any investigation by the FBI, and that's what she sought to do here". "That's about to change" - suggesting he would campaign against Democrats who opposed Kavanaugh in states where Trump did well in 2016.
"I just congratulated him", he said.
Collins offered a defense for Kavanaugh, saying he "reacted with anger and anguish as a father of two young girls". "But certain fundamental legal principles about due process, the presumption of innocence and fairness do bear on my thinking, and I can not abandon them".
As the senators voted, protesters in the Senate gallery screamed, "I do not consent", and, "shame", forcing Vice President Mike Pence, who was presiding over the chamber, to repeatedly call for order.
US President Donald Trump, left, on stage with Republican gubernatorial candidate Secretary of State Kris Kobach, right, during a campaign rally at Kansas Expocentre, October 6, 2018 in Topeka, Kansas.
"As I watch numerous Senators speak and vote on the floor of the Senate I feel like I'm right back at Yale where half the room is laughing and looking the other way". Show up for ME women! I think she's got a level of respect that's unbelievable. Lindsey Graham, slaying as usual with lines like: "We made a lot of women real anxious today, but I'm not getting pregnant so I don't care!" "She didn't stop", Trump said.
Despite being lambasted by protesting Democrats over the weekend, Collins revealed she feels "very comfortable" with her decision following thorough review as well as her own personal consultation with the judge.
Republican Senator Lindsey Graham said he had never been so disturbed as by the events of recent weeks.