August 6, 2018: U.S. Rep. Diane Black, Tennessee Republican, is resigning from office in 2018. On Thursday, August 2, 2018, Black was defeated in her race for Governor of Tennessee in the Republican primary election held in Tennessee. Businessman Bill Lee won the Republican nomination for Governor, defeating three primary opponents, including Black, a former Chairman of the U.S. House Budget Committee. Lee is scheduled to face former Nashville Mayor Karl Dean, who won the Democratic primary election for Governor on August 2, 2018. Meanwhile, U.S. Rep. Marsha Blackburn, Tennessee Republican, and former Democratic Tennessee Gov. Phil Bredesen are set to face off in Tennessee’s high-profile U.S. Senate race after coasting to their respective party nominations. Tennessee Republicans also chose replacements for Blackburn, Black and retiring U.S. Rep. John “Jimmy” Duncan, all of whom are vacating solid Republican U.S. House seats this year, 2018. Knox County Mayor Tim Burchett won the Republican nomination for Duncan's East Tennessee seat, and former State Agriculture Commissioner John Rose won the primary for Black's seat. State Sen. Mark Green, who was briefly Trump's pick for U.S. Army Secretary before he withdrew from the nomination after controversial comments he'd made about Muslims and gay rights surfaced, was unopposed in the primary election for Blackburn's seat.