The U.S. Supreme Court has upheld a Missouri law establishing a 300-foot buffer zone around funerals, and has upheld some state laws creating buffer zones around abortion clinics. But today, all nine justices found that a Massachusetts law establishing a 35-foot buffer zone around abortion clinics violates the First Amendment of the Constitution. You can find the full texts of the majority opinion and two concurrences in McCullen et al v Coakley here (pdf).

Chief Justice John Roberts wrote for the majority, joined by Justices Stephen Breyer, Elena Kagan, Ruth Bader Ginsburg, and Sonia Sotomayor. The ruling found that although the Massachusetts law was not attempting to regulate speech based on content, “The buffer zones burden substantially more speech than necessary to achieve the Commonwealth’s asserted inter­ests,” which “include ensuring public safety outside abortion clinics, preventing harassment and intimidation of patients and clinic staff, and combating deliberate obstruction of clinic entrances.”

There is a long history of intimidating and sometimes violent protests outside Massachusetts abortion clinics. But the majority rejected state officials’ contention that the 2007 law was needed because a previous, less restrictive buffer zone law had not worked. The court argued that a more narrowly-tailored approach, stepping up law enforcement around the Boston clinic with the most problems, could achieve the same end without restricting protesters’ free speech in public areas.

Justice Antonin Scalia wrote a separate opinion, joined by Justices Anthony Kennedy and Clarence Thomas, concurring in judgment only. He would have thrown out the law because it regulates speech in a “content-based” manner and can’t survive the “strict scrutiny” standard which “requires that a regulation represent “the least restrictive means” of furthering “a compelling Gov­ernment interest.” Justice Samuel Alito wrote a separate opinion concurring in judgment. He would throw out the state law because it “discriminates based on viewpoint. Speech in favor of the clinic and its work by employees and agents is permitted; speech criticizing the clinic and its work is a crime.”