Roe v Wade: Supreme Court abortion draft is authentic, chief justice says as he launches investigation into 'egregious breach of trust'

The leaked draft opinion document that suggests the Supreme Court is set to overturn a historic law that legalised abortion is authentic, US Chief Justice John Roberts has said.

In a draft 'opinion' document written by Justice Samuel Alito, the court says the landmark Roe v Wade decision in 1973 was "egregiously wrong from the start".

The authenticity of the document was in question but Mr Roberts has confirmed it is real, which indicates that a majority of the nine Supreme Court justices are set to overturn the constitutional right to abortion.

He also announced an investigation into how the document was leaked will be launched, calling it an "egregious breach of trust."

He described it as a "betrayal of the confidences of the court" that aimed to "undermine the integrity" of its operations.

"I have directed the Marshal of the Court to launch an investigation into the source of the leak," he added.

US President Joe Biden says he opposes the move to overturn a historic law that legalised abortion, saying he is ready to act if the court attempts to roll back abortion rights.

"I believe that a woman's right to choose is fundamental, Roe has been the law of the land for almost fifty years, and basic fairness and the stability of our law demand that it not be overturned," he said.

"If the court does overturn Roe, it will fall on our nation's elected officials at all levels of government to protect a woman's right to choose."

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The president later explained he had received a call confirming the document is a "real draft but it doesn't represent who is going to vote for it".

He added that if the rationale of the decision were to be sustained as released, "a whole range of rights are in question" and it would mark a "fundamental shift" in what the US has achieved.

"It goes far beyond in my view, if it becomes the law and if what is written remains, it goes far beyond the concern of whether or not there is a right to choose," he said.

Mr Biden also noted that a decision overturning Roe would raise the stakes for voters in November's heated midterm elections.

"It will fall on voters to elect pro-choice officials this November. At the federal level, we will need more pro-choice senators and a pro-choice majority in the House to adopt legislation that codifies Roe, which I will work to pass and sign into law," the president said.

Justice Samuel Alito's document was first reported by Politico, which said it had been circulated inside the court.

The draft opinion reads: "We hold that Roe and Casey must be overruled", referencing the 1992 case Planned Parenthood v Casey that affirmed Roe's finding of a constitutional right to abortion services - but allowed states to place some constraints on the practice.

Explained:What is Roe v Wade and how could abortion become illegal in many US states?

The Supreme Court has yet to issue an official ruling in the case, and opinions - and even justices' votes - have been known to change during the drafting process.

The court is expected to rule on the case before its term is up in late June or early July.

What has the reaction been?

The leaked document has been met with disappointment by many, including pro-abortion rights' groups and senators.

Planned Parenthood said it "makes clear" its "deepest fears are coming true" and the US has reached a "crisis moment".

Democratic Senator Bernie Sanders called for people to act "now" to "pass legislation that codifies Roe v Wade as the law of the land".

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Read more:'Do something Democrats' - Abortion rights supporters gather outside US Supreme Court

In a joint statement, Senate Majority Leader Chuck Schumer and House Speaker Nancy Pelosi said if the report is true, the Supreme Court is "poised to inflict the greatest restriction of rights in the past fifty years".

Democratic senator Debbie Stabenow argued that the decision will have "grave consequences for women" across the country and will be the "ultimate intrusion into a woman's right to privacy".

"Imagine what this would mean for a 12-year-old in Michigan who is raped. If Roe v Wade falls, Michigan will revert back to a 1931 law that makes abortion at any stage a felony with no exceptions for rape or incest.

She asked: "Who should decide what's best for this 12-year-old? The girl and her family working with her doctor based on their own faith or a right-wing Supreme Court and Republicans in the United States Senate?"

However, US Senate Republican Leader Mitch McConnell described the leaking of the report as an "attack on the independence of the Supreme Court" and "another escalation in the radical left's ongoing campaign to bully and intimidate federal judges".

"The disgraceful statements by President Biden, Speaker Pelosi, and Leader Schumer refuse to defend judicial independence and the rule of law and instead play into this toxic spectacle. Real leaders should defend the Court's independence unconditionally," he said.

It comes amid a legislative push to restrict abortion in several Republican-led states, with Oklahoma being the most recent by passing several bills, including one that goes into effect this summer making it a felony to perform an abortion.

What does recent polling on abortion rights show?

Abortion rights are a highly argued topic in the US, with polling showing relatively few Americans want to see Roe overturned.

A poll in December found Democrats increasingly view protecting abortion rights as a high priority for the government

In 2020, AP VoteCast found 69% of voters in the presidential election said the Supreme Court should leave the Roe Wade decision as is; just 29% said the court should overturn the decision.

In general, AP-NORC polling finds a majority of the public favours abortion as being legal in most or all cases.

Still, when asked about abortion policy generally, Americans have nuanced attitudes on the issue, and many don't think abortion should be possible after the first trimester or that women should be able to obtain a legal abortion for any reason.