South Carolina argues that federal Medicaid statutes give states the flexibility to determine qualified providers. It could topple the abortion juggernaught.

The Supreme Court is set to hear arguments Wednesday over South Carolina’s effort to keep Planned Parenthood facilities from receiving Medicaid funding if they perform abortions, part of a dispute that could impact Congress’ ability to mandate coverage in the program.

The Supreme Court will hear oral arguments on Wednesday in a case that, at first glance, appears to involve only a technical interpretation of the federal Medicaid Act. But the dispute has drawn wides