The justices, in a 6-3 ruling authored by Chief Justice John Roberts, threw out a lower court's decision that had rejected Trump's claim of immunity from federal criminal charges involving his efforts to undo his 2020 election loss to Joe Biden. The six conservative justices were in the majority, while its three liberal members dissented.
Trump is the Republican candidate challenging Biden, a Democrat, in the Nov. 5 U.S. election in a 2020 rematch. The Supreme Court's slow handling of the case and its decision to return key questions about the scope of Trump's immunity to the trial judge to resolve make it improbable he will be tried before the election on these charges brought by Special Counsel Jack Smith.
"We conclude that under our constitutional structure of separated powers, the nature of presidential power requires that a former president have some immunity from criminal prosecution for official acts during his tenure in office," Roberts wrote.
Immunity for former presidents is "absolute" with respect to their "core constitutional powers," Roberts wrote, and a former president has "at least a presumptive immunity" for "acts within the outer perimeter of his official responsibility," meaning prosecutors face a high legal bar to overcome that presumption.
In remarks at the White House, Biden called the ruling "a dangerous precedent" because the power of the presidency will no longer be constrained by the law.
"This nation was founded on the principle that there are no kings in America ... no one is above the law, not even the president of the United States," added Biden, speaking hours after one of his campaign officials said the ruling makes it easier for Trump "to pursue a path to dictatorship."
The ruling could scuttle parts of the special counsel's case as U.S. District Judge Tanya Chutkan mulls the breadth of Trump's immunity.
In recognizing broad immunity for Trump, Roberts cited the need for a president to "execute the duties of his office fearlessly and fairly" without the threat of prosecution.
"As for a president's unofficial acts," Roberts added, "there is no immunity."
Trump hailed the ruling in a social media post, writing: "BIG WIN FOR OUR CONSTITUTION AND DEMOCRACY. PROUD TO BE AN AMERICAN!"