Mike Crapo Bio
Michael Dean Crapo (born May 20, 1951) is an American lawyer and politician who has served as the senior United States senator from Idaho since 1999. A member of the Republican Party, he represents one of the longest-serving Senate careers in Idaho history. Crapo is widely regarded as a conservative voice on fiscal, energy, and social issues, and he is currently the dean of Idaho’s congressional delegation.
Before his time in Washington, Crapo built a career in Idaho state politics and the practice of law. He previously represented Idaho’s 2nd congressional district in the U.S. House of Representatives from 1993 to 1999, and earlier served in the Idaho State Senate, including as president pro tempore from 1988 to 1992.
Early Life and Background
Michael Dean Crapo was born on May 20, 1951, in Idaho Falls, Idaho, to Melba (née Olsen) and George Crapo. He grew up in Idaho and became an Eagle Scout in 1966, a milestone that would later be recognized with the Distinguished Eagle Scout Award in 2000. His younger brother, Terry Crapo, became a rising figure in Idaho Republican politics, serving as majority leader in the Idaho House of Representatives from 1968 to 1972.
Crapo attended Brigham Young University, where he earned a Bachelor of Arts, summa cum laude, in political science in 1973. He then went on to Harvard Law School, graduating with a Juris Doctor, cum laude, in 1977. His academic record at both institutions helped lay the foundation for a career in law and public service.
Path to US Politics
After graduating from law school, Crapo served for one year as a law clerk to Judge James M. Carter of the U.S. Court of Appeals for the Ninth Circuit. He returned to Idaho Falls to practice law, joining his brother Terry Crapo’s firm of Holden Kidwell Hahn and Crapo. During the 1980s, he became increasingly active in Republican Party campaigns for seats in the Idaho State Legislature.
Following Terry Crapo’s death from leukemia in 1982, Mike ran for an open seat in the Idaho Senate and won election in 1984. In 1988, after Senate President pro tempore Jim Risch lost reelection, Crapo was chosen by his colleagues to lead the chamber, a position he held until 1992. On January 27, 1989, he briefly served as acting governor of Idaho for about 12 hours while both Governor Cecil D. Andrus and Lieutenant Governor Butch Otter were out of the state.
Mike Crapo Career
Early Career (1984–1992)
Crapo’s early political career centered on the Idaho State Senate, where he served from 1984 to 1992. As president pro tempore, he helped shape the chamber’s agenda and built relationships with party leaders across the state. His leadership role in the state senate established him as a prominent conservative voice in Idaho Republican politics.
In 1992, Crapo was elected to the United States House of Representatives, representing Idaho’s 2nd congressional district. He served three terms in the House from 1993 to 1999, focusing on issues important to his district, including energy, natural resources, and fiscal responsibility.
U.S. Senate Breakthrough (1999–Present)
Crapo was elected to the United States Senate in 1998, succeeding fellow Republican Dirk Kempthorne, who retired to run for governor of Idaho. He took office in January 1999 and has since won reelection multiple times, including a near-unanimous victory in 2004 with 99.2 percent of the vote. In 2010, 2016, and 2022, he won additional terms, most recently in 2022 with about 61 percent of the vote.
During his Senate tenure, Crapo has served on several major committees, including Banking, Housing and Urban Affairs; Finance; Budget; Environment and Public Works; and Indian Affairs. He chaired the Senate Banking, Housing and Urban Affairs Committee during the 116th Congress. He also co-chairs the Senate Nuclear Caucus, the Canada-U.S. Inter-parliamentary Group, the COPD Caucus, which he founded, and the Congressional Sportsmen’s Caucus.
Senior Senator Era (2009–Present)
Crapo became Idaho’s senior senator when the 111th United States Congress convened on January 3, 2009, succeeding Larry Craig. In the 112th Congress, he ranked 39th in Senate seniority, and he has continued to climb the ladder of seniority in subsequent Congresses. His position as dean of the Idaho congressional delegation reflects his long-standing influence on state and national policy.
Crapo has been a leading voice on energy policy, supporting nuclear energy projects at the Idaho National Laboratory and helping author the Nuclear Energy Innovation Capabilities Act and the Nuclear Energy Innovation and Modernization Act. He has also engaged in international diplomacy, including an October 2023 visit to China as part of a bipartisan congressional delegation that met with General Secretary Xi Jinping. In September 2025, Crapo chaired a three-hour Senate hearing featuring Robert F. Kennedy Jr., drawing national attention.
Notable Events and Milestones
Crapo was one of 50 senators who voted to convict President Bill Clinton of impeachable offenses in February 1999. He was later recognized by The New York Times as a figure in the bipartisan “Gang of Six” for his work on budget negotiations. He has received multiple “A+” grades from the National Rifle Association Political Victory Fund for his voting record on gun-related issues. Crapo also faced a personal challenge in January 2013, when he pleaded guilty to driving under the influence following a December 2012 incident.
Mike Crapo Career Wins
Mike Crapo has compiled a long record of electoral success at the state and federal levels. From his first election to the Idaho Senate in 1984 to his most recent Senate victory in 2022, Crapo has consistently won his races, often by wide margins. His longest streak of Senate victories spans from 1998 to the present, reflecting durable support among Idaho voters.
U.S. Senate Highlights
Crapo won his first Senate race in 1998, succeeding Dirk Kempthorne. In 2004, he was reelected with 99.2 percent of the vote, one of the most lopsided Senate victories in modern American history. He followed that with wins in 2010 (71 percent), 2016 (66 percent), and 2022 (61 percent), each time defeating Democratic, and often third-party, challengers.
Other Wins and Achievements
Beyond his Senate victories, Crapo won three consecutive terms in the U.S. House of Representatives from 1992 to 1998. He was elected to the Idaho Senate in 1984 and served as president pro tempore from 1988 to 1992. He is also an Eagle Scout, receiving the award in 1966 and later earning the Distinguished Eagle Scout Award in 2000.
Mike Crapo Family
Family Background and Political Lineage
Michael Dean Crapo was born to George Crapo and Melba (née Olsen) Crapo and raised in Idaho Falls, Idaho. His younger brother, Terry Crapo, served as majority leader in the Idaho House of Representatives from 1968 to 1972 and was considered a rising star in Idaho politics before his death from leukemia in 1982.
Personal Life
Crapo married Susan Diane Hasleton in June 1974, and the couple has five children. He is a member of the Church of Jesus Christ of Latter-day Saints. Crapo was diagnosed with prostate cancer in 1999 and underwent a radical prostatectomy in January 2000, achieving a full recovery. After a recurrence in 2005, he received radiation treatments and has since advocated for early detection of cancer and other treatable diseases, including efforts to establish a federal Office of Men’s Health.