Guarding Tess (movie, 1994)

Doug is a Secret Service Agent who has just completed his stint in charge protecting Tess Carlisle—the widow of a former U.S. President, and a close personal friend of the current President. He finds that she has requested that he not be rotated but instead return to be her permanent detail. Doug is crushed, and—after returning—wants off her detail as she is very difficult to guard and makes her detail crazy with her whims and demands.