A businessman, Lundeen previously served on the
Colorado State Board of Education, representing the Fifth District, and for a time he served as the Board's chair. A bill proposal by Lundeen aimed at requiring voters to cast ballots in person, limiting
early voting, and only allowing voters to cast ballots by mail if they opt for it despite voting by mail having been used in Colorado for years. In February 2021, a Senate panel rejected the bill. In March 2021, Lundeen attended a panel that promoted the false claim that the
2020 presidential election was fraudulent. During a speech, Lundeen
cast doubt on the validity of the election results including that of Colorado's. On June 9, 2025, Lundeen announced his resignation from the Colorado State Senate to be President and CEO of the American Excellence Foundation. ==Electoral history==