Article continues below advertisementDonald Trump couldn't stop raving over the state of his health during a recent interview - though he awkwardly forgot the name of the neurological disorder his dad, Fred Trump, passed away from: Alzheimer's.Amid mounting concerns over his physical and mental state, the 79-year-old POTUS boasted about his family's genetics and said his father, who died at age 93 in 1993, had a "heart that couldn't be stopped.