H. R. Haldeman Harry Robbins `` Bob '' Haldeman ( better known as H. R. Haldeman ; October 27 , 1926 -- November 12 , 1993 ) was an American political aide and businessman , best known for his service as White House Chief of Staff to President Richard Nixon and his consequent involvement in the Watergate scandal .
H. R. Haldeman Harry Robbins `` Bob '' Haldeman ( better known as H. R. Haldeman ; October 27 , 1926 -- November 12 , 1993 ) was an American political aide and businessman . He served as White House Chief of Staff to President Richard Nixon .