"After Trump's visit to the World Economic Forum in Davos in February, Gupta reflected on the president's family history of age-related dementia and claimed that he was seeing a "trend line" that "seems like it's getting worse."

The president's father died in 1999 at the age of 93 from pneumonia that was complicated by Alzheimer's disease. He had also been previously diagnosed with dementia.

The connection has also been made by Trump's own niece, who told The Daily Beast Podcast in November that there are times she looks at Trump and sees her grandfather.

"I see that same look of confusion. I see that he does not always seem to be oriented to time and place. His short-term memory seems to be deteriorating."

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"The acting out, behavior changes, lashing out, acting unreasonable," Gupta said. "One could say this is his core fundamental personality based on what we've seen over, frankly, his entire adult life, but it's getting worse."

Psychologist Dr. John Gartner, who also highlighted the president's increasingly erratic behavior as a sign of his decline, told The Daily Beast Podcast in December that undertaking the same cognitive assessment multiple times suggests that Trump's doctors are monitoring dementia.

"You could maybe justify giving someone the MoCA once, just on their age, just as part of a physical. If you're giving it to him three times, that means you're not assessing dementia. That means you're monitoring dementia," Gartner said."