President Donald Trump has revoked Secret Service protection for John Bolton, the president's former national security adviser said on Tuesday.

Bolton was part of Trump's first administration until November 2019 and received assassination threats from Iran after leaving. He has also been a vocal critic of the president since his departure from the administration.

"I am disappointed but not surprised that President Trump has decided to terminate the protection previously provided by the United States Secret Service," Bolton posted on X on Tuesday. "Notwithstanding my criticisms of President Biden's national-security policies, he nonetheless made the decision to extend that protection to me in 2021.

"The Justice Department filed criminal charges against an Iranian Revolutionary Guard official in 2022 for attempting to hire a hit man to target me. That threat remains today, as also demonstrated by the recent arrest of someone trying to arrange for President Trump's own assassination. The American people can judge for themselves which President made the right call."

An Iranian Islamic Revolutionary Guard Corps (IRGC) member was charged by the DOJ in August 2022 for an assassination plot against Bolton. The department offered a reward of up to $20 million for information leading to an arrest or conviction of the IRGC member. The DOJ alleged that the suspect offered $300,000 to hire people to kill Bolton between October 2021 and April 2022.

The Secret Service declined The Hill's request for comment and the White House has not yet commented, according to the news outlet.

It is unclear if Trump directly rescinded Bolton's Secret Service protection, but presidents can determine who receives Secret Service protection, The New York Post reported.

Trump revoked Bolton's security clearance on Monday, along with 49 living former intelligence agency officials who helped coordinate an effort to discredit reporting that former President Joe Biden’s son Hunter had left his laptop at a computer repair business.

The president's executive order on revoking security clearances stated that the reason for revoking Bolton's was because of his 2020 book.

"Former National Security Advisor John R. Bolton published a memoir for monetary gain after he was terminated from his White House position in 2019," the order reads. "The book was rife with sensitive information drawn from his time in government. The memoir’s reckless treatment of sensitive information undermined the ability of future presidents to request and obtain candid advice on matters of national security from their staff. Publication also created a grave risk that classified material was publicly exposed."