Trump's doctor stands by his positive report

WASHINGTON -- Donald Trump's personal physician tells NBC News he needed just five minutes to write a glowing public assessment of Trump's health as a limousine waited to carry the letter back to Trump.

Dr. Harold Bornstein's report last December remains the only medical information released so far by Trump's campaign.

In an interview Friday, Bornstein says the 70-year-old Trump is in excellent health both physically and mentally.

While he wrote last year that Trump's physical strength and stamina are extraordinary, Bornstein tells NBC that he doesn't think Trump is in any better or worse shape than the average person who exercises daily.

Trump and his allies have been questioning the health of his Democratic rival, Hillary Clinton. Her physician has said the former secretary of state has no serious issues.