WASHINGTON — Republicans voted Thursday to invoke the "nuclear option" to strip Democrats of their power to block Supreme Court nominee Neil Gorsuch from being confirmed — a victory with far-reaching consequences that could forever change the way justices are approved and shatter the Senate's bipartisan traditions.

The dramatic action, approved by a party line vote, clears the way for the Republican majority to end the Democrats' filibuster of Gorsuch's nomination later Thursday. They would then be able to move to a final confirmation vote Friday.

The vote to approve the nuclear option changed the Senate filibuster rule for Supreme Court nominees so that only a simple majority of senators are needed to end debate and move to a final confirmation vote. Before that change, it took 60 votes to end debate.

The action comes nearly 14 months after the death of Supreme Court Justice Antonin Scalia on February 13, 2016.

Earlier on Thursday, Democrats won a short-lived victory by blocking Gorsuch. An initial motion to end debate failed 55-45, falling five votes short of the 60 needed to end a filibuster before the rule change.  Only four Democrats voted with the 52 Republican senators to advance Gorsuch's nomination.

Senate Majority Leader Mitch McConnell, R-Ky., changed his vote to a "no" at the last minute to preserve his ability to invoke the "nuclear option," changing Senate rules to get around the filibuster.

"There's a reason why it's called the nuclear option," Senate Democratic leader Chuck Schumer, D-N.Y., said on the Senate floor before the series of votes began. "It's the most extreme measure, with the most extreme consequences."

"The consequences for the Senate and for the future of the Supreme Court will be far-reaching," Schumer said. The 60-vote threshold in the Senate has been "the guardrail of our democracy ... when it comes to the courts, the guardrails are being dismantled."

McConnell urged Democrats on Thursday morning to have a last-minute change of heart and let Gorsuch's nomination go through. Otherwise, he warned sternly, "This will be the first and last partisan filibuster of a Supreme Court nomination."

He emphasized that a successful partisan filibuster would be the first ever mounted against a Supreme Court nominee in the Senate's 230-year history. “This is the latest escalation in the never-ending judicial war,” McConnell said.

Schumer said Democrats "have principled reasons to vote against this nominee." Among them, he said, are Gorsuch's votes for corporate interests over average Americans, his ties to President Trump and his "deeply-held, far-right, special-interest judicial philosophy that is far outside the mainstream."

But Senate Judiciary Committee Chairman Chuck Grassley, R-Iowa, said Democrats recognize that Gorsuch -- a graduate of Columbia, Harvard and Oxford who clerked for two Supreme Court justices and has served a decade as an appeals court judge -- deserves to be confirmed.

"That’s why this is an especially sad state of affairs," Grassley said. "At the end of the day, we’re left with an exceptional nominee, with impeccable credentials, and broad bipartisan support."

The number-two ranking Democrat, Sen. Richard Durbin, D-Ill., ridiculed Republicans for suggesting Democrats brought the Senate to this final action. He said the GOP leader cannot utter the name of Merrick Garland, who Republicans blocked from the court all last year.

“For the first time in the history of the Senate, for the first time ever, this Republican-led Senate refused to give this nominee a hearing and a vote,” Durbin said. Rather than voting on Gorsuch, he said, “We should be celebrating the one-year anniversary of Merrick Garland on the Supreme Court.”