Trump’s off-the-cuff disclosure that he underwent an MRI scan is raising fresh questions about the secrecy surrounding Trump’s health and the need for presidents to be more transparent.

Trump is the oldest person to be elected president, and his aides and allies have long projected him as the picture of strength and vitality.

Outside physicians initially raised questions after Trump visited Walter Reed Military Medical Center earlier this month for what the White House described as a routine follow-up visit, though it was his second visit in six months.