The Supreme Court on Monday struck down an abortion clinic restriction law out of Louisiana. The justices found the Louisiana measure was almost identical to a Texas admitting privileges law they struck down in 2016.
Abortion advocates said the Louisiana law placed an "undue burden" on women seeking the barbaric procedure.
The National Right to Life Committee is "extremely disappointed", said its president, Carol Tobias.
Abortion rights supporters welcomed the ruling.
Ilyse Hogue, president of NARAL Pro-choice America, called the decision "a win for women in Louisiana who will continue to have access to the time-sensitive abortion care they need".
In a 5-4 ruling, conservative Chief Justice John Roberts joined the four liberal justices in the majority.
He explained that the court had settled the question of "admitting privileges" already and that there was no reason to change that consensus.
The Supreme Court has, yet again, made clear that it rejects the pretext that these laws are meant to protect women's health.
"I agree with the Supreme Court's decision in June Medical, which recognizes the burden that the Louisiana statute could impose".
The Louisiana law is just one of several abortion rights cases that will be appealed to the Supreme Court, which include bans on abortion once a fetal heartbeat is detected and the nearly total ban passed in Alabama.
June Medical Services LLC v. Russo is notably similar to a Texas law the court ruled was unconstitutional in 2016's Whole Woman's Health v. Hellerstedt.
Brett Kavanaugh, meanwhile, whom many Republican senators said would honor precedents - Susan Collins, I'm looking in your direction - apparently had no qualms about overturning the Supreme Court's decision from four years ago.
Associate Justices Ruth Bader Ginsburg, Sonia Sotomayor and Elena Kagan joined Breyer in the opinion.
Dissenting were Associate Justices Clarence Thomas, Samuel Alito, Neil Gorsuch and Brett Kavanaugh.
In his dissent, Thomas said the abortion providers lacked legal standing.
It's an alluring prospect Trump believes could galvanize both his loyal base but also provide an opportunity to improve his standing among those voters whose support he is now hemorrhaging, people familiar with Trump's thinking said.
He also argued that overruling precedent should be considered when a case is an "outlier".
In February 2019, the Court blocked the Louisiana law from going into effect, pending a review of the case.
"Well, unfortunately, it's become less and less of a surprise when the chief justice - in these high profile cases - strays from what his legal position might have been", she told Kilmeade, citing a recent ruling on the Deferred Action for Childhood Arrivals (DACA) program where Roberts appeared to have flipped sides.
The chairman of the U.S. Conference of Catholic Bishops' Committee for Pro-Life Activities, Archbishop Joseph Naumann of Kansas City in Kansas, said in a statement that Catholics would "grieve this decision" but would "continue to pray and fight for justice for mothers and children".