 In 2001, he was defeated for reelection by insurance executive Mike Fahey in a close race.Daub then served as a member of the Social Security Advisory Board from 2002 to 2006 and joined Missouri-based law firm Blackwell Sanders Peper Martin LLP (now Husch Blackwell) in 2005.In 2007, Daub briefly ran for the U.S. Senate seat being vacated by Senator Chuck Hagel; he exited the race to offer an early endorsement to Mike Johanns, former Nebraska governor and USDA secretary, who won the seat.