WASHINGTON >> President Joe Biden today blasted a “radical” Supreme Court draft opinion that would throw out the landmark Roe v. Wade abortion rights ruling t hat has stood for a half century. The court cautioned no final decision had been made, but Biden warned that other privacy rights including same-sex marriage and birth control are at risk if the justices follow through.

Chief Justice John Roberts said he had ordered an investigation into what he called the “egregious breach of trust” in leaking the draft document, which was dated to February. Opinions often change in ways big and small in the drafting process, and a final ruling has not been expected until the end of the court’s term in late June or early July.

Across the nation, Americans grappled with what might come next. The Democratic-controlled Congress and White House both vowed to try to blunt the impact of such a ruling, but their prospects looked dim.

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A decision to overrule Roe would have sweeping ramifications, leading to abortion bans in roughly half the states, sparking new efforts in Democratic-leaning states to protect access to abortion, and potentially reshaping the contours of this year’s hotly contested midterm elections.

The draft was published by the news outlet Politico late Monday.

Speaking to reporters before boarding Air Force One, Biden said he hoped the draft wouldn’t be finalized by justices, contending it reflects a “fundamental shift in American jurisprudence” that threatens “other basic rights” like access to birth control and marriage.

“If this decision holds, it’s really quite a radical decision,” he added.

“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,” Biden said. “And 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.”

Though past efforts have failed, Senate Majority Leader Chuck Schumer said he intended to hold a vote.

“This is as urgent and real as it gets,” Schumer said on the Senate floor today. “Every American is going to see on which side every senator stands.”

Leaders in New York and California rolled out the welcome mat to their states for women seeking abortions, and other Democratic states moved to protect access to abortion in their laws.

The court’s ruling would be most acutely felt by women who don’t have the means or ability to travel from states that have or stand poised to pass stiff abortion restrictions or outright bans

Whatever the outcome, the Politico report late Monday represented an extremely rare breach of the court’s secretive deliberation process, and on a case of surpassing importance.

“Roe was egregiously wrong from the start,” the draft opinion states. It was signed by Justice Samuel Alito, a member of the court’s 6-3 conservative majority who was appointed by former President George W. Bush.

The document was labeled a “1st Draft” of the “Opinion of the Court” in a case challenging Mississippi’s ban on abortion after 15 weeks. The draft opinion in effect states there is no constitutional right to abortion services. It would allow individual states to more heavily regulate or outright ban the procedure.

“We hold that Roe and Casey must be overruled,” it states, 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. “It is time to heed the Constitution and return the issue of abortion to the people’s elected representatives.”

The draft opinion strongly suggests that when the justices met in private shortly after arguments in the case on Dec. 1, at least five — all the conservatives except perhaps Chief Justice Roberts — voted to overrule Roe and Casey, and Alito was assigned the task of writing the court’s majority opinion.

Votes and opinions in a case aren’t final until a decision is announced or, in a change wrought by the coronavirus pandemic, posted on the court’s website.

Politico said only that it received “a copy of the draft opinion from a person familiar with the court’s proceedings in the Mississippi case along with other details supporting the authenticity of the document.”

The report comes amid a legislative push to restrict abortion in several Republican-led states — Oklahoma being the most recent — even before the court issues its decision. Critics of those measures have said low-income and minority women will disproportionately bear the burden of the new restrictions.

The leak jumpstarted the intense political reverberations that the high court’s ultimate decision was expected to have in the midterm election year. Already, politicians on both sides of the aisle were seizing on the report to fundraise and energize their supporters on both sides of the issue.

Democrats contended that several conservative justices misled senators about their feelings.

And Maine Republican Susan Collins, who supports abortion rights but was a pivotal GOP vote for the confirmations of Justices Neil Gorsuch and Brett Kavanaugh, said if the draft reflects the final opinion of the court, “it would be completely inconsistent with what Justice Gorsuch and Justice Kavanaugh said in their hearings and in our meetings in my office.”

Republican Sen. Lisa Murkowski of Alaska, told reporters on Capitol Hill that “my confidence in the court has been rocked,” and said her proposal with Collins to legislate abortion rights should be reinvigorated.

Polling shows relatively few Americans want to see Roe overturned. In general, AP-NORC polling finds a majority of the public favors abortion being legal in most or all cases. Few say abortion should be illegal in all cases.

Still, Americans have nuanced attitudes on the issue. In an AP-NORC poll conducted last June, 61% said abortion should be legal in most or all circumstances in the first trimester of a pregnancy. However, 65% said abortion should usually be illegal in the second trimester, and 80% said that about the third trimester, though many Americans believe that the procedure should be allowable under at least some circumstances even during the second or third trimesters.

Alito, in the draft, said the court can’t predict how the public might react and shouldn’t try. “We cannot allow our decisions to be affected by any extraneous influences such as concern about the public’s reaction to our work,” Alito wrote in the draft opinion, according to Politico.

Outside, the Supreme Court building, anti-abortion rights protesters carried signs that said “Ignore Roe” and “In God We Trust” while their pro-abortion-rights counterparts held placards declaring “Bans off our Bodies” and “Impeach Kavanaugh.” Crowds built as the day wore on.

Jessica Fendryk, 39, who drove an hour from Bel Air, Maryland, spoke of generations of demonstrators.

“I can’t believe how many women I have met that did this in their lifetime already. And so I feel like I owe it to them to be here because they already did this,” she said. “And now we have to be fighting for them all over again.”

Outside Washington, the reaction among conservatives was muted, ranging from cautious celebration over the anticipated ruling to sharp criticism of the source of the leaked draft.

“We will let the Supreme Court speak for itself and wait for the court’s official opinion,” Mississippi Attorney General Lynn Fitch said in a statement.

At Supreme Court arguments in December, all six conservative justices signaled that they would uphold the Mississippi law, and five asked questions that suggested that overruling Roe and Casey was a possibility.

Only Roberts seemed prepared to take the smaller step of upholding the 15-week ban, though that, too, would be a significant weakening of abortion rights.

Until now, the court has allowed states to regulate but not ban abortion before the point of viability, around 24 weeks.

Twenty-six states are certain or likely to ban abortion if Roe v. Wade is overturned, according to the pro-abortion rights think tank the Guttmacher Institute. Of those, 22 states already have total or near-total bans on the books that are currently blocked by Roe, aside from Texas. The Texas law banning it after six weeks has been allowed to go into effect by the Supreme Court due to its unusual civil enforcement structure. Four more states are considered likely to quickly pass bans if Roe is overturned.

Sixteen states and the District of Columbia have protected access to abortion in state law.