sentences:  In September 2019, Cook announced that he would not run for re-election to Congress in 2020, and instead run for a seat on the San Bernardino County Board of Supervisors.In the March 3, 2020 primary election, Cook defeated three opponents with an outright majority to avoid a November runoff and succeed Robert A. Lovingood, making him the San Bernardino County Supervisor-elect from the 1st district.Cook will be sworn in on December 7, 2020.