U.S. President Joe Biden warned on Monday that the U.S. Supreme Court's ruling on presidential immunity sets a "dangerous precedent" that Donald Trump would exploit if elected in November.

"For all practical purposes today's decision almost certainly means there are no limits to what a president can do. This is a fundamentally new principle, and it's a dangerous precedent," Biden said in a short speech at the White House. 

The Supreme Court earlier ruled that Trump cannot be prosecuted for actions that were within his constitutional powers as president in a landmark decision recognizing for the first time any form of presidential immunity from prosecution.

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 Biden. The six conservative justices were in the majority, while its three liberal members dissented.

(With input from agencies)