Deborah Ann Greer Stabenow (born April 29, 1950) is the senior United States Senator from Michigan and a member of the Democratic Party.
 Before her election to the U.S. Senate, she was a member of the United States House of Representatives, representing Michigan's 8th congressional district from 1997 to 2001.
 She previously served as a member of the Ingham County Board of Commissioners, Michigan House of Representatives, and Michigan Senate.
John Randolph Thune (born January 7, 1961) is an American politician and senior United States Senator from South Dakota, a member of the Republican Party.
 He previously served as a United States Representative for South Dakota 's at-large congressional  .
 He became South Dakota's senior senator with the retirement of Tim Johnson in 2015.
 He is South Dakota's senior senator, having served as the GOP's Chief Deputy Whip in 2006, chairman of the Republican Policy Committee in June 2009, and Republican Conference Chairman in 2011, the third-ranking position in the Senate.
 He has worked in politics and civic organizations since completing his MBA graduate degree.
 He is also the current dean of South Dakota's congressional delegation.
Richard Mauze Burr (born November 30, 1955) is the senior United States Senator from North Carolina, having served since 2005.
 A member of the Republican Party, Burr represented North Carolina's 5th congressional district in the United States House of Representatives from 1995 to 2005.
 Prior to his political career, he worked for seventeen years in private business with Carswell Distributing.
Benjamin Louis Cardin (born October 5, 1943) is an American politician and member of the Democratic Party who serves as the senior United States Senator from Maryland, in office since 2007.
 Before his election to the Senate, Cardin was previously a member of the United States House of Representatives, representing  's 3 congressional district (1987–2007).
 He also served in the Maryland House of Delegates (1967–87), serving as Speaker (1979–87).
 He was the youngest Speaker in Maryland history.
 In half a century as an elected official, he has never lost an election.
Rostin Behnam is an American lawyer and government official who currently serves as a commissioner of the Commodity Futures Trading Commission.
 Prior to assuming his current role, he served as senior counsel to U.S. Senator Debbie Stabenow.
 Behnam has also practiced law in New York City and worked at the New Jersey Office of the Attorney General.
Peter B. Davidson is an American lawyer and government official who currently serves as the General Counsel of the United States Department of Commerce.
 He was previously the senior vice president for congressional relations at Verizon Communications, general counsel to the United States Trade Representative, vice president for congressional relations at US West and Qwest, general counsel and policy director to the Majority Leader of the House of Representatives, attorney-advisor in the Office of Legal Counsel of the United States Department of Justice, director of congressional and media relations at the United States Information Agency, staffer to Representatives Dick Armey and Bill Frenzel, and law clerk on the United States Court of Appeals for the Tenth Circuit.
Thomas Stewart Udall (born May 18, 1948) is the senior United States Senator from New Mexico and a member of the Democratic Party.
 First elected to the Senate in 2008, he represented  's 3 congressional district as a member of the United States House of Representatives from 1999 to 2009, and was the Attorney General of New Mexico from 1991 to 1999.
 A member of the Udall family, he is the son of Stewart Udall, the nephew of Mo Udall, and the cousin of Mark Udall.
 He is the current dean of New Mexico's Congressional Delegation.
Sherrod Campbell Brown (born November 9, 1952) is an American politician and author who is the senior United States Senator from Ohio, in office since January 3, 2007.
 Brown is a member of the Democratic Party.
 Before his election to the Senate, he was a member of the United States House of Representatives, representing Ohio's 13th congressional district from 1993 to 2007.
 He previously served as the Ohio Secretary of State (1983–1991) and as a member of the Ohio House of Representatives (1974–1982).
William Morgan Cassidy (born September 28, 1957) is an American physician and politician currently serving as the senior United States Senator from the state of Louisiana.
 He is a member of the Republican Party and served as the U.S. Representative for Louisiana's 6th Congressional District from 2009 to 2015.
 Cassidy became Louisiana's senior senator when David Vitter retired in 2017.
John Francis "Jack" Reed (born November 12, 1949), is the senior United States Senator from Rhode Island, serving since 1997.
 A member of the Democratic Party, he previously served in the United States House of Representatives for Rhode Island 's 2 congressional district from 1991 to 1997.

Question: Which congressional district did this senior United States Senator from Michigan, for whom Rostin Behnam served as senior counsel, serve in the House of Representatives from 1997 to 2001?
Answer: Michigan's 8th congressional district