Timothy Endicott Wirth (born September 22, 1939) is a former United States Senator from Colorado. Wirth, a Democrat, was a member of the House from 1975 to 1987 and was elected to the Senate in 1986, serving one term there before stepping down. Additionally, he served both as Deputy Assistant Secretary for Education for part of the Nixon Administration and later for the Clinton Administration as the first Under Secretary of State for Global Affairs for the U.S. State Department.