Senate Democrats must now decide how hard they are willing to fight over the high-court seat that Republicans blocked President Obama from filling after the death of Justice Antonin Scalia last year.

The fate of the Supreme Court hangs in the balance. Over the last two weeks, Democratic voters across the country have shown they’re anxious, and ready to protest Trump’s agenda. That’s increased the pressure that Democratic Senators feel from their base to make a stand against Trump, even as some facing re-election in 2018 must work to maintain support from centrist voters.

It’s clear, however, that Democrats are already attempting to build a case against the nomination, portraying Gorsuch as overly friendly to Wall Street and corporate interests and unsupportive of women’s rights.

In his statement, Schumer accused the nominee of siding “with corporations over working people,” and demonstrating “a hostility toward women’s rights.” In an interview following the announcement, Senator Richard Blumenthal of Connecticut said he had “deep, serious concerns,” citing Gorsuch’s “positions on privacy rights … women’s health care, worker and consumer protections, and public health and safety.” Senator Ron Wyden of Oregon also laid down a clear marker, saying in a statement that “no Senator who believes that individual rights are reserved to the people, and not the government, can support this nomination.”

It was clear even before Trump announced his decision that Democrats were gearing up for a fight. Schumer publicly declared earlier this month that “if the nominee is not bipartisan and mainstream, we will absolutely keep the seat open.” Democratic Senator Jeff Merkley went a step further, threatening to filibuster any nomination that isn’t Merrick Garland, Obama’s pick to fill the seat who Republicans blocked from getting so much as a hearing in the Senate.

“I can only speak for myself, but I believe this is a stolen seat,” Merkley said in an interview on Tuesday afternoon ahead of Trump’s announcement. “There is no nominee who is a legitimate nominee unless the president plans to nominate Merrick Garland.”

In a separate interview before news of Trump’s pick had been made public, Democratic Senator Ed Markey of Massachusetts predicted a “battle royale” if Trump puts forward a nominee who “is not in the mainstream of American constitutional jurisprudence.”

The degree to which Democrats put up a unified front—or splinter in the midst of the confirmation fight—and how quickly and forcefully they decide exactly how to respond to Trump’s nomination could go a long way toward either reassuring or demoralizing voters who want to see stiff resistance to the Trump agenda in Washington.

Different lawmaker are sure to have different priorities, especially since a number of Democratic senators are facing re-election in 2018 in states that Trump won. And many Democrats may ultimately stop short of declaring an all-out war on Trump’s Supreme Court pick, even if they express concern over his nomination and ultimately oppose it.