Bill Nelson

Clarence William Nelson II is an American politician, attorney, and former astronaut who served from 2001 to 2019 as a United States senator from Florida and from 2021 to 2025 as the administrator of the National Aeronautics and Space Administration (NASA). A member of the Democratic Party, Nelson served from 1979 to 1991 as a U.S. representative from Florida's Space Coast, and from 1972 to 1978 as a member of the Florida House of Representatives. In January 1986, he became the second sitting member of Congress to fly in space, after Senator Jake Garn, when he served as a payload specialist on mission STS-61-C aboard the Space Shuttle Columbia. Before entering politics, he served in the United States Army Reserve during the Vietnam War.