Article continues below advertisementDonald Trump's health is once again being examined closely.Earlier this month, the president was caught dozing off during the U.S. Open finals, sparking a new round of questions about his condition. Two clinical psychologists - John Gartner and Harry Segal - now claim the signs point to something more serious, with Trump showing physical and linguistic symptoms of "early dementia."Article continues below advertisement"You're at the finals of the U.S. Open, a riveting performance...