Several hundred members of Congress filed “amicus,” or supporting, briefs in a closely watched upcoming Supreme Court case that could decide the future of abortion access.

The brief from 207 mostly GOPers included signatures from Sens. Mitt Romney, John Cornyn, Marco Rubio and Reps Steve Scalise and Liz Cheney. The opposing brief was signed by 197 members of Congress — a mostly Democratic group that included Sens. Chuck Schumer and Dianne Feinstein, as well as Reps. Nancy Pelosi and Jerry Nadler.

The mostly Republican signatories — 39 senators and 168 representatives — argued that Louisiana clinics are rife with safety violations — and that the time is ripe to reconsider the legal underpinnings of Roe v. Wade, the seminal 1973 Supreme Court case that established a constitutional right to an abortion. All were Republicans except Democratic Reps. Dan Lipinski and Collin Peterson.

“Roe’s jurisprudence has been characterized by Delphic confusion and protean change,” the members wrote.