 Martin Sheen (qv) has played the U.S. President many times  throughout his career, most notably as John F. Kennedy (qv) in a  1983 miniseries. Ironically, he has also played  Robert F. Kennedy (qv), John Dean (I) (qv) (White House counsel  under Richard Nixon (qv)) and Confederate General Robert E. Lee  (in _Gettysburg (1993)_ (qv)).