Concerns about PresidentDonald Trump’s health have resurfaced after the author of a bombshell biography indicated his condition is “like a black box”.

The 80-year-old leader’s mental and physical capabilities have faced heightened examination in recent months amid a string of public missteps and visible bruising and swelling.

Discussion of his fitness to remain in office gained renewed traction following the publication last month of a biography by two former New York Times journalists.

Maggie Haberman and Jonathan Swan asserted the president maintains nocturnal habits and displays unpredictability, while exhibiting growing “moments of fatigue” during his second term in “Regime Change: Inside the Imperial Presidency of Donald Trump.”

It comes as the daughter of Trump’s doctor made a bombshell claim about his health.

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Haberman intensified the controversy in an interview with MSNOW over the weekend, stating Mr Trump’s health “is like a black box inside that administration” and implying its lack of transparency may represent “an area of failure in the reporting”.

Trump responded to Haberman in an extensive Truth Social post mere hours before the interview, calling her “Maggot Hagerman” and charging her with “bad reporting”.

“Maggot Hagerman has covered me incorrectly for ten years,” he posted. “She has made a living off her bad reporting, and will pay the price when our Multi Billion Dollar Lawsuit against The Failing New York Times gets to court,” reports the Express.

He continued by defending his health, maintaining a recent physical examination had confirmed him to be in a “perfect” state once more. “I just finished a perfect physical at Walter Reed [National Military Medical Centre], I do it every six months, and I requested another Cognitive Test, the only President to do so, three times, and I aced them all,” Trump said.

“Few people in Washington DC could do so, including Maggot and her flunky associate, Jonathan Swan.”

In response to the dig, Swan took to X to write: “I would be honored to do another on-camera interview with President Trump whenever he wants.”

He also posted a photo of Regime Change sitting atop Amazon’s bestseller charts, alongside the caption: “Many people disagree with the president’s assessment. Thanks to you all for reading.”

White House physician Sean Barbarella has backed Trump’s claims regarding his well-being, maintaining that his most recent medical evaluations confirm he is “fully fit” with “strong cardiac, pulmonary, neurological, and overall physical function.” It comes as Trump’s health concerns grow as a new photo shows ‘something wrong’ with the president.