“I am not inclined to filibuster, even though I’m not inclined to vote for him," Leahy — a former chairman of the Judiciary Committee — told a Vermont news outlet.

Neil Gorsuch will need 60 votes — including the support of at least eight Democratic senators — to overcome an initial procedural hurdle. GOP leadership has refused to rule out using the "nuclear" option, which would allow Gorsuch and future Supreme Court nominees to clear the Senate with only a simple majority.

Leahy warned Republicans against going nuclear, saying that eliminating the 60-vote threshold to end debate on a nominee "hurts everybody."

“I was very reluctant to see us the use nuclear option, though I don’t think we would have seen any of President Obama’s judges go through without it," he told VTDigger.

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“He will have to earn 60 votes for confirmation. My vote will be no, and I urge my colleagues to do the same,” he said on the Senate floor.

While most members of the Democratic caucus's progressive wing have said they will oppose him, the 10 Democrats up for reelection in states carried by Trump — who could make or break Gorsuch's nomination — have largely stayed on the fence.

Leahy added that while he has "seen nothing that will bring me to vote for Gorsuch," he's waiting to see his additional written answers before making an official decision.