Supreme Court Justice Elena Kagan said Friday she fears the high court may lack a justice going forward who would serve as a swing vote on cases, speaking hours after President TrumpDonald John TrumpTrump renews attacks against Tester over VA nominee on eve of Montana rally Trump submits 2017 federal income tax returns Corker: Trump administration 'clamped down' on Saudi intel, canceled briefing MORE's second nominee Brett Kavanaugh secured enough votes to be confirmed.

Kagan said at a conference for women at Princeton University that over the past three decades, starting with Justice Sandra Day O'Connor and continuing with Justice Anthony Kennedy, that there was a figure on the bench "who found the center or people couldn't predict in that sort of way."

“It’s not so clear, that I think going forward, that sort of middle position — it's not so clear whether we’ll have it," Kagan said.

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"All of us need to be aware of that — every single one of us — and to realize how precious the court’s legitimacy is," she added. "It's an incredibly important thing for the court to guard is this reputation of being impartial, being neutral and not being simply an extension of a terribly polarizing process."

Kagan, an appointee of former President Obama, spoke Friday alongside fellow Justice Sonia Sotomayor, who also hails from the Supreme Court's liberal bloc.

Her comments came hours after it became clear that Kavanaugh, Trump's pick to succeed the retiring Kennedy, had enough votes to be confirmed.

Kennedy cast the deciding vote on several high-profile cases before the Supreme Court, and his retirement announcement earlier this year left many on the left voicing concerns that the court would lack a swing vote going forward.

The Senate voted earlier Friday to end debate on Kavanaugh's nomination, setting up a final vote on his nomination for Saturday afternoon, capping off weeks of controversy surrounding allegations of sexual assault.

Sen. Susan CollinsSusan Margaret CollinsSusan Collins and the mob mentality Graham: I hope Dems 'get their ass kicked' for conduct around Kavanaugh St. Lawrence alumni, faculty want honorary degree for Collins revoked MORE (R-Maine) announced Friday that she would vote for Kavanaugh, giving him enough support to get confirmed. Sen. Joe ManchinJoseph (Joe) ManchinTrump Jr. to campaign in West Virginia for Manchin challenger Dems go on offense against GOP lawsuit on pre-existing conditions Credit union group to spend .8 million for vulnerable Dem, GOP incumbents MORE (D-W.Va.), who is running for reelection this year in a state Trump won by 42 points in 2016, also said he would vote for Kavanaugh.

The announcements came about a week after Kavanaugh and Christine Blasey Ford, his first accuser, testified before the Senate Judiciary Committee regarding Ford's claims that he sexually assaulted her at a high school party in the early 1980s.

Kavanaugh fiercely denied the accusation. He's also denied sexual misconduct claims from multiple other women, Julie Swetnick and Deborah Ramirez. 

GOP senators said earlier this week that an FBI probe into Kavanaugh found no corroboration for sexual misconduct allegations against him. Democratic senators have blasted the investigation, calling it inadequate.