A Massachusetts law creating a 35-foot no-protest zone around abortion clinics appeared in jeopardy Wednesday as the U.S. Supreme Court questioned the sweep of its restriction on free speech.

With Justice Antonin Scalia leading the way, several justices voiced concern that the buffer zone was too large and too censorious to pass muster under the First Amendment. Under the 2007 law, only patients, staff, law enforcement and passersby can enter the zone while a clinic is open.