Clarence William Nelson II (born September 29, 1942) is an American politician serving as the senior United States Senator from Florida. Before entering politics he served in the U.S. Army Reserve in the Vietnam War. He was first elected to the Senate in 2000. A member of the Democratic Party, he served in the United States House of Representatives from 1979 to 1991. In January 1986, he became the second sitting member of the United Sates Congress to fly in space when he served as a payload specialist on the Space Shuttle Columbia.
Signed Astronaut card.