Aug. 25 (UPI) — President Donald Trump is threatening to investigate former New Jersey Gov. Chris Christie, as he continues to use the Justice Department to punish political adversaries.

Trump made the threat Sunday on his Truth Social account after Christie criticized him during an appearance on a Sunday talk show for rejecting “the idea that there should be separation between criminal investigations” and the president.

In a statement published on his Truth Social media platform Sunday, Trump suggested the Justice Department should investigate Christie over the so-called Bridgegate scandal of 2013, in which former staffers to Christie closed two lanes of the George Washington Bridge, creating traffic jams over several days.

Christie came under intense criticism over Bridgegate, but said he was never aware of what his associates did.

Trump accused Christie of lying about “the dangerous and deadly closure” of the bridge “in order to stay out of prison.”

“Chris refused to take responsibility for these criminal acts,” Trump said. “For the sake of JUSTICE, perhaps we should start looking at that very serious situation again? NO ONE IS ABOVE THE LAW!”

Trump campaigned on using the office of the presidency to retaliate against his political rivals, and he has done just that since returning to the White House in January.

He has used his executive powers to punish those he accuses of targeting him, including lawyers who prosecuted his criminal cases, as well as law firms.

His attorney general, Pam Bondi, earlier this month ordered a grand jury into former President Barack Obama over his administration’s investigation into Russian interference in the 2016 election.

And most recently, the FBI raided the home of Trump’s former national security adviser John Bolton. Bolton has become a critic of Trump and published a book about his time in his administration in 2020, which the U.S. president tried to prevent from happening.

Trump has claimed that Bolton revealed classified information.

Trump’s post on Sunday was made after Christie’s appearance on ABC News’ This Week, in which the former New Jersey governor discussed Trump’s prosecution of Bolton.

“Let me say candidly to the American people who are watching: you were told this,” Christie said.

“You were told that this was what he was going to do. And not by me, by Donald Trump during the 2024 campaign. He told you he was going to do this, that he was going to have a Justice Department that acted as his personal legal representation, and that is what they’re doing.”