New Casino To Be Built In Missouri as Legalization of Online Gambling Looms. The Osage Nation tribe of Missouri is betting on the state going big into online gambling. Last year's bill that failed to gain approval was negotiated by owners of the 13 licensed casinos and the major league franchises. This year, the bill is expected to be passed. It would legalize retail and online and mobile app sports betting in the Missouri. It is also proposed that video lottery terminals be legalized as well. There is no sports wagering bill in Missouri House yet. State Sen. Denny Hoskins is a driving force behind the bid to legalize sports gambling in that state.