The comments come as Republican lawmakers in the Senate and the White House push to confirm Gorsuch to fill the Supreme Court seat left vacant by Justice Antonin Scalia's death previous year. Whatever the objections, Republicans who control the Senate are expected to ensure that President Donald Trump's pick reaches the bench, perhaps before the middle of April.
Udall has said he would not support any Supreme Court nominee who would support overturning Roe v. Wade, the landmark case which legalized abortion.
Right now, it will take every Republican - a likely outcome - and eight Democrats to get Gorsuch the 60 votes he needs.
White House press secretary Sean Spicer called on Schumer to call off the filibuster, saying "it represents the type of partisanship that Americans have grown exhausted of". But his decision to support the filibuster of Gorsuch is significant.
In response to the Democratic criticism, Gorsuch repeatedly said he has often ruled for the "little guy" over corporations. But Senate rules enable Democrats to insist on 60 votes to overcome a procedural move called a filibuster to allow a final up-or-down vote on confirming Gorsuch, 49, to the lifetime job on the nation's highest court.More news: Crude Stocks Up; Gasoline, Diesel Decline
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"After careful deliberation, I have concluded that I can not support Judge Neil Gorsuch's nomination to the Supreme Court", Democratic leader Chuck Schumer said on the Senate floor, a day after Gorsuch finished marathon Judiciary Committee testimony. Not only would this reduce the divisiveness, but it would also result in having one more exceptionally qualified justice on the Supreme Court.
Udall echoed those concerns and said Gorsuch failed to win him over when the two met.
Among judges who have worked with him, U.S. District Judge John Kane praised Gorsuch's independence and cordiality.
That said, the chances of this filibuster being carried out indefinitely is unlikely, since Republicans could pursue the "nuclear option" in order to break through Democrats' stonewalling. Jameel Jaffer, former deputy director of the American Civil Liberties Union, said the Senate should not confirm Gorsuch without getting answers. Garland is also supported by notable jurists of all stripes.