Speculation about Donald Trump's mental health has been ongoing, with some experts raising concerns about dementia. Mary Trump, the president's gay niece and a clinical psychologist, has added to this speculation. She notes that she sees similarities between Trump and her grandfather, Fred Trump, who developed Alzheimer's disease in his late seventies or early eighties.

Mary Trump's observations are based on her own professional expertise and personal experience with her family. She has written about her concerns in a recent Substack post, drawing parallels between Trump's behavior and her grandfather's mental decline. Further details about Mary Trump's observations and concerns are available from her Substack post, which provides more insight into her thoughts on the president's mental health.