Donald Trump has commuted the sentence of his former adviser Roger Stone - just days before he was due to report to prison to serve 40 months for crimes related to an investigation into Russian interference in the 2016 US election.
The White House confirmed the commuting of the sentence in a statement, saying Stone was a victim of the Russia "hoax".
"Roger Stone has already suffered greatly," the White House added.
"He was treated very unfairly, as were many others in this case. Roger Stone is now a free man!"
Following the decision, Stone told reporters: "I was worried about my safety there. I was worried about my health. So the president has saved my life."
Stone, 67, had been sentenced in February for lying to Congress, witness tampering and obstructing the House investigation into whether the Trump campaign colluded with Russia to win the election.
He was set to report to prison by Tuesday.
A commutation would not erase Stone's felony convictions in the same way a pardon would, but it would protect him from serving prison time as a result.
The decision reflects Mr Trump's anger over the Russia investigation and is a testament to his conviction that he and his associates were mistreated by agents and prosecutors.
His administration has been eager to rewrite the narrative of special counsel Robert Mueller 's Russia investigation, with Mr Trump's own Justice Department moving to dismiss the criminal case against former national security adviser Michael Flynn in May.
Stone, for his part, had been open about his desire for a pardon or commutation, appealing for the president's help in a series of Instagram posts in which he maintained that his life could be in jeopardy if imprisoned during a pandemic.
Mr Trump had repeatedly intervened in Stone's case, including just before his sentencing when the president suggested in a tweet that Stone was being subjected to a different standard than several prominent Democrats.
He said the conviction "should be thrown out" and called the Justice Department's initial sentencing recommendation "horrible and very unfair".
"Cannot allow this miscarriage of justice!" he wrote.
Congressional Democrats and other critics have accused Mr Trump of undermining the rule of law and democracy.
House of Representatives Intelligence Committee chairman Adam Schiff said: "With this commutation, Trump makes clear that there are two systems of justice in America: one for his criminal friends, and one for everyone else."
The top Democrat on the Senate Intelligence Committee, Mark Warner, added: "The United States was founded on the rule of law. It seems our president has nothing but contempt for it."
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Bill Russo, a spokesman for Mr Trump's Democratic election opponent Joe Biden, accused the president of abusing his power "as he lays waste to the norms and the values that make our country a shining beacon to the rest of the world".
Stone was the sixth aide or adviser of Mr Trump to have been convicted of charges brought as part of Mr Mueller's investigation into election interference.
Mr Trump has also offered clemency to other political allies, including Maricopa County Sheriff Joe Arpaio, who was awaiting sentencing at the time, conservative commentator Dinesh D'Souza, who had been convicted on campaign finance violations, and Conrad Black, a newspaper publisher convicted of fraud who had written a flattering book about the president.