Michael Dean "Mike" Crapo (pronounced /ˈkreɪpoʊ/ "Cray-poe"; born May 20, 1951) is the senior United States Senator from the state of Idaho. He is a member of the Republican Party. He became Idaho's Senior Senator in January 2009, as Larry Craig declined to seek reelection in 2008.
Crapo was born in Idaho Falls, Idaho, the son of Melba (née Olsen) and George Lavelle Crapo. He is distantly related to Henry Howland Crapo, who served as Governor of Michigan from 1865 to 1869, and William Crapo Durant, Henry's grandson, who founded General Motors. Mike Crapo and Henry Crapo are first cousins, four times removed, as Henry's father, Jesse Crapo, and Mike's great-great-great grandfather, Charles Crapo, were brothers. Crapo graduated from Idaho Falls High School in 1969, then earned a B.A. in political science from Brigham Young University in 1973 and a J.D. from Harvard Law School in 1977.
The senator married Susan Diane Hasleton in June 1974; the couple has five children.