OKLAHOMA CITY (AP) — The Republican campaign to unseat deep-red Oklahoma's lone Democrat in Congress is officially underway after a GOP state lawmaker Wednesday jumped into the fray for a seat both parties expect to work fiercely to win in 2020.

State Sen. Stephanie Bice said she planned to take back the seat Democrat Kendra Horn won in one of the midterm elections' biggest upsets . Horn beat two-term Republican Steve Russell for Oklahoma's 5th Congressional District, which President Donald Trump won in 2016 and that the GOP had controlled for four decades. At least two lesser known Republican...