Chairman of the Joint Chiefs of Staff Air Force Gen. Dan Caine looks on as U.S. Secretary of War Pete Hegseth speaks to senior military leaders at Marine Corps Base Quantico, in Quantico, Virginia September 30, 2025. Andrew Harnik/Pool via REUTERS

Military veteran Doug Krugman retired from the U.S. Marine Corps because of President Donald Trump, according to an op-ed published Thursday by the Washington Post.

“On Sept. 30, at an unprecedented gathering of senior military leadership, President Donald Trump said, 'If you don’t like what I’m saying, you can leave the room — of course, there goes your rank, there goes your future,'" Krugman who spent 24 years in the United States Marine Corps, wrote in the Post.

Now, he's out.

“By coincidence, Sept. 30 was my last day as a colonel in the United States Marine Corps. I gave up my career out of concern for our country’s future,” he wrote.

“No commander in chief is perfect,” Krugman said, adding he continued to serve under other presidents because he “believed the Constitution brought the country more success than failure."

"And I believed our presidents took their oaths to it seriously," he added.

“With President Trump, I no longer believe that,” he said. “During his first term, his actions became increasingly difficult for me to justify, culminating with the Jan. 6 attack on Congress as it tried to execute its duties. I hoped he had learned from those errors, but it only took a few days of his second term for me to realize he had not. I could not swear without reservation to follow a commander in chief who seemed so willing to disregard the Constitution.”