https://www.cnn.com/2004/HEALTH/09/23/wh.doctors/
(CNN) -- Whether the president is overseas, on the campaign trail or aboard Air Force One, a White House doctor is close at hand in case of a minor mishap -- or a catastrophic event.
"The doctor is always within a few feet away, so you essentially shadow the president," says Dr. E. Connie Mariano, a White House physician from 1992 to 2001.