Richard B. "Dick" Cheney is an American politician and businessman born in 1941 who served as a prominent national official across several decades. He is best known for his tenure as Vice President of the United States from 2001 to 2009 and for his central role in shaping Republican administrations and 21st-century national security policy. Cheney has been a polarizing figure, widely discussed for both his managerial influence and his advocacy of an assertive executive branch.

Career and public offices

As vice president, Cheney was widely regarded as an unusually powerful occupant of the office, exercising strong influence over defense, intelligence, and energy policy. He played a leading role in the administration's response to the September 11, 2001 attacks, the subsequent Afghanistan campaign and the 2003 Iraq invasion. That influence provoked extensive public and academic debate about executive power, oversight, and the legal basis for counterterrorism measures.

Cheney's career spans public service and the private sector. After leaving public office he remained active in policy discussions, political endorsements, and memoirs. He also attracted attention for his health: long-standing cardiac issues led to several procedures and a heart transplant in 2012, a fact often noted in profiles of his life.

Histories of late-20th and early-21st-century U.S. politics frequently treat Cheney as a pivotal operator who combined institutional knowledge, ideological conviction, and networked influence. His legacy is contested: some praise his steadiness on national security and defense, while others criticize policies associated with expanded executive authority and contentious interrogation and surveillance practices. For further general background, see major public sources and documentary accounts.

See also: overviews of vice-presidential power, modern defense policy, and debates over executive authority in the early 2000s.