President Trump shakes hands with White House Physician Rear Adm. Dr. Ronny Jackson, following his annual physical at Walter Reed National Military Medical Center in Bethesda, Md., on January 12, 2018.

President Trump shakes hands with White House Physician Rear Adm. Dr. Ronny Jackson, following his annual physical at Walter Reed National Military Medical Center in Bethesda, Md., on January 12, 2018.