President TrumpDonald John TrumpTrump conversation with foreign leader part of complaint that led to standoff between intel chief, Congress: report Pelosi: Lewandowski should have been held in contempt 'right then and there' Trump to withdraw FEMA chief nominee: report MORE’s former national security adviser H.R. McMaster said Wednesday that some of the presidents' advisers are "a danger to the Constitution.”

Politico reported that McMaster accused some of his former White House colleagues of attempting to influence Trump to advance their own agenda.

The outlet reported that McMaster, a retired Army lieutenant general, sought to portray himself as part of a group that provided Trump with unbiased policy advice during an event hosted by the Foundation for Defense of Democracies.

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“The second group of people, and I think this is true in any administration," he said, are those “who are not there to give the president options — they’re there to try to manipulate the situation based on their own agenda, not the president’s agenda.”

McMaster declined to name those to whom he was referring.

He added that a third group of advisers to Trump “cast themselves in the role of saving the country, even the world, from the president.” “I think those latter two categories of people are actually a danger to the Constitution of the United States,” McMaster said.

McMaster exited the White House in April 2018 after serving for a little more than a year in the role John BoltonJohn BoltonHillicon Valley: Zuckerberg to meet with lawmakers | Big tech defends efforts against online extremism | Trump attends secretive Silicon Valley fundraiser | Omar urges Twitter to take action against Trump tweet Overnight Defense: Trump says he has 'many options' on Iran | Hostage negotiator chosen for national security adviser | Senate Dems block funding bill | Documents show Pentagon spent at least 4K at Trump's Scotland resort Bolton blasts Trump's foreign policy in closed-door meeting: report MORE now occupies. McMaster did not mention Bolton in his remarks.

The retired three-star Army lieutenant general appeared to exit Trump's administration on good terms, though Trump had reportedly voiced displeasure with McMaster’s lengthy foreign policy briefings. Politico noted that McMaster's comments Wednesday marked a rare public disclosure of his struggles working in the Trump administration.

McMaster took over the position as top national security adviser to Trump after his predecessor, Michael Flynn, was fired for lying to Vice President Pence and other senior officials about his conversations with Russia's ambassador to the U.S.