David Ferdinand Durenberger (born August 19, 1934) is an American politician. He was a Republican Senator from Minnesota. He was born in St. Cloud, Minnesota, and attended St. John's University and the University of Minnesota Law School. He served in the United States Army from 1956 to1963. He was elected to the United States Senate, November 7, 1978, to complete the unexpired term of Hubert H. Humphrey. He was reelected in 1982 and again in 1988 and served from November 8, 1978 to January 3, 1995. He was not a candidate for reelection in 1994. He was denounced by the Senate in 1990 for unethical conduct. He had been the chairman of the Select Committee on Intelligence Ninety-ninth Congress. He was succeeded by Rod Grams.