A Senate Democrat believes President Trump's nominee for the Supreme Court will be confirmed by the upper chamber.

"Ultimately, yeah, I believe he will be,'' Sen. Kirsten Gillibrand, D-N.Y., told NY1 about appellate judge Neil Gorsuch's nomination on Tuesday.

Gillibrand said her colleagues should "vote their conscience" in light of the judge's "ultra-right-wing conservative" views.

"I hope we do vote him down. But make no mistake: If we do hold the line with 60 votes, Mitch McConnell will change the rules the next day," Gillibrand said.

"I do not have any hope that he won't change the rules the minute he doesn't get his way. So it likely will be 51 votes, regardless, at any given time that a nominee is blocked."

Trump has told Senate Republicans to use the "nuclear option" to ram the Colorado judge through the confirmation process. Senate Minority Leader Chuck Schumer insisted Gorsuch will need 60 votes, at least to end debate. That would entail recruiting some Democrats to support him, or let him pass.

Gorsuch has been called mainstream conservative compared to "ultra right wing conservative" that the junior senator from New York would like to tag him with, but his jurisprudence would likely be similar in principle to the late Justice Antonin Scalia.

The hearing is expected to take place in March.