A prominent psychiatrist has finally broken his silence on what he describes as President Donald Trump’s alarming mental decline. He made the prediction on a podcast this week, and what he said next left the room speechless. The warning was not wrapped in careful political language. It was direct, clinical, and deeply unsettling.
Dr. John Gartner, a psychiatrist and former professor at Johns Hopkins University, appeared on a new episode of The Daily Beast Podcast with host Hugh Dougherty. He came on the show with a specific and frightening message about what he believes is coming during the rest of Trump’s second term. He said that Trump is losing it, and that the country may be heading toward a moment that cannot be undone.
Gartner’s warning was not about policy. It was about the nuclear codes.
“I really believe that we are going to wake up one morning and he will have launched a first nuclear strike,” Gartner said.
“I believe that this is going to happen because he wants to do it.”
Those two sentences alone changed the tone of the entire conversation. Gartner was not speaking in hypotheticals or worst-case scenarios. He was speaking as a trained mental health professional who believes the situation has already moved past the point of theoretical concern.
Gartner has long argued that Trump shows clear signs of frontotemporal dementia, a serious neurological condition that destroys a person’s ability to make sound decisions. According to medical literature, this condition causes severe impairment in impulse control, judgment, and the ability to anticipate consequences. It essentially removes the brain’s natural braking system, leaving a person unable to stop themselves from acting on dangerous thoughts.
Gartner said he has not personally examined the president, but he made clear that he does not believe that changes his conclusion. He said Trump’s increasingly disinhibited public behavior provides more than enough evidence for him to feel confident. The pattern of decline, he argued, is visible to anyone paying close attention.
“He no longer has the frontal lobe to give him the restraint, inhibition, and judgment that would cause him to inhibit himself,” Gartner said.
This is where the conversation moved from alarming to truly frightening. The problem is not just what Trump may want to do. The deeper problem is that almost no one around him would dare say no. The people who once served as guardrails in the first term are entirely gone from this one.
“He now has a yes-man cabinet of true believers and psychopaths who are not going to be a backstop,” Gartner said. “We don’t have General Mattis, we don’t have John Kelly, we don’t have Rex Tillerson. There are no more adults in the room.”
During Trump’s first term, figures like General James Mattis and John Kelly were widely seen as institutional checks. They were experienced, independent-minded officials who had the stature and the courage to push back on dangerous impulses. That kind of backstop simply does not exist inside the current administration.
Gartner’s warning came just one day after a political development that he said made everything even more dangerous. Rep. Thomas Massie of Kentucky, one of the last genuinely independent voices in the Republican Party, was defeated in his primary by Trump-backed challenger Ed Gallrein, a former Navy SEAL. Massie had been one of the few Republicans willing to publicly criticize Trump, including voting against the president’s signature tax legislation and speaking out against the war in Iran.
His defeat sent a clear and chilling message to every remaining Republican in elected office. Fall in line, or be removed. The party has become, in practical terms, an institution of pure personal loyalty to one man.
“Massie has been thrown out,” Gartner said. “There were literally no men or women in elected political office as a Republican who isn’t blindly lockstep following him.”
“So I think people need to really get their minds around this,” he continued. “This is going to happen.”
Gartner is not alone in raising these concerns. In April 2026, a group of 36 leading physicians and mental health professionals issued a formal statement calling for Trump’s immediate removal from office on medical grounds. They cited markedly deteriorating cognitive function, severely impaired judgment, and what they described as a rapidly worsening, reality-untethered decline. Their statement was entered into the Congressional Record by two U.S. senators.
Even voices on the political right have begun to express alarm. Former Representative Marjorie Taylor Greene called Trump’s threat to destroy Iran’s civilization “not tough rhetoric, it’s insanity.” Conservative commentator Candace Owens called him “a genocidal lunatic.” These are not phrases coming from the political left. These are coming from people who once supported him enthusiastically.
The 25th Amendment exists precisely for moments like this one. It provides a legal and constitutional pathway to remove a president who is no longer mentally capable of carrying out the duties of the office. Yet despite the growing chorus of medical and political voices, it has not been seriously discussed by those with the power to act on it.
What makes Gartner’s prediction so difficult to dismiss is the cold logic behind it. A leader who has lost the mental ability to exercise restraint, who is surrounded only by people who will always say yes, and who has eliminated every independent voice from his own party, is a leader with no checks left on his behavior. That is the scenario Gartner is describing, and he believes it is no longer a question of if, but when.
The room may have gone speechless when he spoke. The real question now is whether the people with the power to act will stay silent too.
