Article continues below ADVERTISEMENT "At a certain age, about 86, 87, he started getting, what do they call it?" Article continues below ADVERTISEMENT He pointed to his forehead and looked to his press secretary for the word that escaped him. White House aides defend president's fitness American presidents rank among the planet's most intensely monitored individuals. This hasn't deterred White House staff from testifying to his energy levels and mental acuity. One physician's assistant claims Trump is healthier than Barack Obama, who left the White House at 55.