Byron Leslie Dorgan (born May 14, 1942) is an American author, businessman, attorney and former United States Senator and United States Congressman from North Dakota and currently serves as a senior policy advisor for the Washington, DC law firm Arent Fox LLP. He served 12 years in the U.S. House and 18 years in the Senate. He was a member of the Senate Democratic leadership for 16 years, first as Assistant Democratic Floor Leader and then as Chairman of the Democratic Policy Committee and Chairman of the Committee on Indian Affairs. In 2010, Dorgan announced that he would not seek re-election in the 2010 North Dakota senate election.In addition to his work at Arent Fox, Dorgan serves as a Senior Fellow at the Bipartisan Policy Center, where he focuses on energy policy issues as Co-Chair of BPC’s Energy Project and is also a member of the ReFormers Caucus of Issue One. He is an Adjunct Visiting Professor at Georgetown University, and serves on several boards of directors, including the Board of Governors of Argonne National Laboratory, and on the National Advisory Board of the Center for Arms Control and Non-Proliferation.Dorgan is also a New York Times best-selling author of four books, including two on economic and political issues and two novels described as eco-thrillers.