Senate Democratic opposition to President Donald Trump’s Supreme Court nominee swelled Friday as Democrats neared the numbers needed for a filibuster, setting up a showdown with Republicans who have the votes to confirm Neil Gorsuch.

Sens. Claire McCaskill of Missouri, Richard Blumenthal of Connecticut and Brian Schatz of Hawaii became the latest Democratic senators to announce their opposition to Gorsuch, a 49-year-old federal appeals court judge in Denver whose conservative rulings make him an intellectual heir to the justice he would replace, the late Antonin Scalia.

McCaskill’s decision came a day after she said she was torn over the decision. She said she’s opposing the federal appeals court judge because his opinions favor corporations over workers and he’s shown “a stunning lack of humanity” in some of those decisions.

She also criticized Trump in her statement announcing her opposition, saying “the president who promised working people he would lift them up has nominated a judge who can’t even see them.”

Senate Minority Leader Chuck Schumer of New York warned Republicans against changing Senate rules, which could prove momentous for the chamber and would allow all future Supreme Court nominees to get on the court regardless of opposition from the minority party. He says President Donald Trump should just pick a new nominee if Gorsuch is blocked.