Science Advisor to the President War II by President Franklin Delano Roosevelt. Vannevar Bush chaired this office through Roosevelt's death in 1945, and continued under Roosevelt's successor Harry S. Truman until 1951. After the war, President Harry S. Truman replaced the OSRD with the Science Advisory Committee in 1951. The office was moved to the White House on November 21, 1957, by President Dwight D. Eisenhower to provide advice and recommendation in response to the Space Race started by the USSR's launch of the first artificial Earth satellite, Sputnik 1. President Richard M. Nixon eliminated the PSAC in 1973, rather than appointing a replacement for
Secretary-General to the President as president ditched all of McDunphy's rules and in effect started from scratch. Commentators credited the ditching of McDunphy's rules as a key factor in the rebirth of the office and in its subsequent popularity. Though technically the Secretary General to the President is attached to the Department of the Taoiseach in practice he or she is treated as being a full department head in his or her own right. McDunphy however accused the Secretary to the Government and Secretary to the Taoiseach, Maurice Moynihan of plotting to undermine him and take over control of the Office of the President,