John Spencer (born John Speshock Jr.; December 20, 1946 – December 16, 2005) was an American actor. He was best known for his role as Leo McGarry on the NBC political drama series The West Wing and for his role as attorney Tommy Mullaney in L.A. Law. His performance on The West Wing earned him a Primetime Emmy Award in 2002, out of five total nominations. (Via Wikipedia)