McGeorge "Mac" Bundy was an American academic who served as the U.S. National Security Advisor to Presidents John F. Kennedy and Lyndon B. Johnson from 1961 through 1966. He was president of the Ford Foundation from 1966 through 1979. Despite his career as a foreign-policy intellectual, educator, and philanthropist, he is best remembered as one of the chief architects of the United States' escalation of the Vietnam War during the Kennedy and Johnson administrations.

The Assistant to the President for National Security Affairs (APNSA), commonly referred to as the National Security Advisor (NSA), is a senior aide in the Executive Office of the President, based at the West Wing of the White House. The national security advisor serves as the principal advisor to the President of the United States on all national security issues.