Senate Democrats on Tuesday left Judge Neil Gorsuch with two roads to the Supreme Court: winning over all of the party’s remaining swing votes, or relying on the so-called nuclear option.

The five Democratic senators up for reelection next year in states where President Donald Trump won by single digits have all endorsed a filibuster of Gorsuch, while the five facing voters next year in states Trump won by double digits all remain undecided. Gorsuch would have to carry all five of those fence-sitters to overcome a Democratic filibuster — plus his home-state Sen. Michael Bennet (D-Colo.), Maine independent Sen. Angus King, and another more surprising senator.

But after liberals raised the pressure on Democrats to oppose Gorsuch and the National Rifle Association targeted four red-state Democrats with $1 million in pro-Gorsuch ads, Trump’s nominee ended the day with his chances at beating a filibuster lower than ever.