U.S. Sen. Bob Casey declined to comment today on the two women mentioned most often as President Donald Trump’s potential nominees to replace the late Supreme Court Justice Ruth Bader Ginsburg.

During a conference call with reporters, Casey wouldn’t talk about U.S. District Court judges Barbara Lagoa or Amy Coney Barrett other than to again question Trump’s use of lists of potential court nominees developed by conservative think tanks.

Without saying he would oppose Trump’s nominee, Casey did say he doubts he could vote for someone on the lists developed by the conservative Heritage Foundation and the Federalist Society.

The Heritage Foundation infamously called unions ‘cartels’” he said. “So I don’t want a Supreme Court picked by those two right-wing groups. And, unfortunately, virtually any nominee to the high court by this president will come from those lists.”

Anyone on the list would likely “be hostile to the Affordable Care Act,” Casey said.

The Supreme Court is scheduled in November to take up a challenge to the Patient Protection and Affordable Care Act, known more commonly as Obamacare.

This is a far-right, corporate court right now,” Casey said.

Casey warned eliminating the act would allow insurance companies to refuse coverage to people with pre-existing medical conditions; charge women more for coverage; end insurance exchanges that provide coverage to people who can’t afford it otherwise; force senior citizens to pay more prescription drugs; and cut expanded Medicaid, which covers most of the 20 million people who gained coverage because of Obamacare.