The U.S. Supreme Court found on Monday that Donald Trump cannot be prosecuted for official actions taken as president, but can for private acts, in a landmark ruling recognizing for the first time any form of presidential immunity from prosecution, Paralel.Az reports citing Reuters.

The justices, in a 6-3 ruling written by Chief Justice John Roberts, threw out a lower court's decision rejecting Trump's claim of immunity from criminal charges involving his efforts to undo his 2020 election loss to Joe Biden. The six conservative justices were in the majority. Its three liberals dissented.

"We conclude that under our constitutional structure of separated powers, the nature of presidential power requires that former president have some immunity from criminal prosecution for official acts during his tenure in office," Roberts wrote.

"At least with respect to the president's exercise of his core constitutional powers, this immunity must be absolute. As for his remaining official actions, he is also entitled to immunity," Roberts added.

Trump hailed the ruling in a social media post, writing: "Big win for our constitution and democracy. Proud to be an American!"

Roberts said Trump's case will be sent back to the lower courts for further review. The Supreme Court's slow handling of the blockbuster case already had helped Trump by making it unlikely that any trial on these charges brought by Special Counsel Jack Smith could be completed before the election.

The court analyzed four categories of conduct contained in Trump's indictment: his discussions with Justice Department officials following the 2020 election, his alleged pressure on then-Vice President Mike Pence to block certification of Biden's election win, his alleged role in assembling fake pro-Trump electors and his conduct related to the Jan. 6, 2021, attack on the U.S. Capitol.

The court found Trump was absolutely immune for conversations with Justice Department officials but returned the case to lower courts to determine whether Trump has immunity for the other three categories. The ruling marked the first time since the nation's 18th century founding that the Supreme Court has declared that former presidents may be shielded from criminal charges in any instance.

Trump is the Republican candidate challenging Biden, a Democrat, in the Nov. 5 U.S. election in a 2020 rematch.

The decision came in Trump's appeal of a lower court ruling rejecting his immunity claim. The court decided the case on the last day of its term.