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Earl Benjamin Nelson (born May 17, 1941) is an American attorney, businessman, and politician who served as the 37th governor of Nebraska from 1991 to 1999 and as a United States Senator from Nebraska from 2001 to 2013. He is a member of the Democratic Party, and as of 2022, the last Democrat to serve as either a senator or governor of Nebraska. Nelson was one of the most conservative Democrats in the Senate, frequently voting against his party.