WASHINGTON (CNS) -- The Supreme Court appears set to overturn its Roe v. Wade decision, which legalized abortion for nearly 50 years, according to a leaked initial draft of a court opinion obtained by Politico and published online the evening of May 2.

Just minutes after the leak was published, reactions were fast and furious on social media, and barricades were erected around the Supreme Court. Many people gathered at the court in protest and some, including students from The Catholic University of America, were there to pray the rosary.

The draft opinion, written by Justice Samuel Alito, said Roe "was egregiously wrong from the start" and that "Roe and Casey must be overruled." Casey v. Planned Parenthood is the 1992 decision that affirmed Roe.

Alito's opinion said the court's 1973 Roe decision had exceptionally weak reasoning "and the decision has had damaging consequences. And far from bringing about a national settlement of the abortion issue, Roe and Casey have enflamed debate and deepened division," he wrote.

He also said abortion policies should be determined on the state level. 

Politico's report says Alito's opinion is supported by Justices Clarence Thomas, Neil Gorsuch, Brett Kavanaugh and Amy Coney Barrett and that Justices Stephen Breyer, Sonia Sotomayor and Elena Kagan were working on dissents. It was not clear how Chief Justice John Roberts planned to vote.

The 98-page draft, which includes a 31-page appendix of historical state abortion laws, is an opinion in Dobbs v. Jackson Women's Health Organization -- a case about Mississippi's ban on abortions after 15 weeks of pregnancy with the potential to also overturn Roe.

The fact that the opinion was leaked also caused significant reaction, because this is unprecedented in the court's recent history, especially with such a big case.

Politico acknowledged that "deliberations on controversial cases have in the past been fluid. Justices can and sometimes do change their votes as draft opinions circulate and major decisions can be subject to multiple drafts and vote-trading, sometimes until just days before a decision is unveiled."

"The court's holding will not be final until it is published, likely in the next two months," it added.

But that does not stop the firestorm of speculation and discussion.

A tweet from scotusblog, which reports on the Supreme Court, said: "It's impossible to overstate the earthquake this will cause inside the Court, in terms of the destruction of trust among the Justices and staff. This leak is the gravest, most unforgivable sin."

Pro-life groups praised the court's potential decision but some also questioned the motivation behind the leak and wondered if the court was being manipulated by this action.

A May 2 tweet by Jeanne Mancini, president of the March for Life Education and Defense Fund, said her organization would "not be providing comment on an official decision of #scotus possible leak until a decision is officially announced."

"We also believe that given the leak the court should issue a ruling as soon as possible. This leak was meant to corrupt the process. It is heartbreaking that some abortion advocates will stoop to any level to intimidate the court no matter what the consequences," she added.

"This leak is an act of desperation from rabid abortion supporters," said Kristan Hawkins, president, Students for Life, in an email to Catholic News Service. She noted that although she didn't know if rumors about ending Roe were accurate she stressed that "ending Roe is the right decision."

Marjorie Dannenfelser, president of the Susan B. Anthony List, also expressed some skepticism but also praise for the potential decision.

"If the draft opinion made public tonight is the final opinion of the court, we wholeheartedly applaud the decision," she said in a statement adding: "If Roe is indeed overturned, our job will be to build consensus for the strongest protections possible for unborn children and women in every legislature."

Those on the other side of the issue were similarly taken aback by the leak but also by the potential impact of the decision if it ultimately echoes the draft opinion.

American Civil Liberties Union tweeted: "If the Supreme Court does indeed issue a majority opinion along the lines of the leaked draft authored by Justice Alito, the shift in the tectonic plates of abortion rights will be as significant as any opinion the Court has ever issued."

And Planned Parenthood said in a May 2 tweet: "Let's be clear: This is a draft opinion. It's outrageous, it's unprecedented, but it is not final."

During oral arguments in this case last December, a majority of the justices indicate that they would uphold Mississippi's abortion ban after 15 weeks of pregnancy, which was struck down by a federal District Court in Mississippi in 2018 and upheld a year later by the New Orleans-based U.S. Court of Appeals for the 5th Circuit.

A 15-week ban is not a "dramatic departure from viability," Roberts said.

The point of viability -- when a fetus is said to be able to survive on its own -- was key to the discussion because the Supreme Court has consistently ruled that states cannot restrict abortion before 24 weeks or when a fetus is said to be able to survive on its own.

In the draft opinion, Alito said Roe's viability distinction "makes no sense."

If this draft is adopted by the court, it means a ruling in favor of the Mississippi abortion ban. If it goes further to overturn Roe, there would be stricter limits to abortion in parts of the U.S., particularly the South and Midwest, with several states set to immediately impose broad abortion bans.