OPINION: Washington sports betting – Tribal casinos shouldn’t get a new monopoly The Seattle Times editorial board · February 13, 2020 at 11:17 pm In the two years since the U.S. Supreme Court allowed legalization of sports betting, legislatures across the country have rushed to open up betting windows. Washington’s lawmakers must exercise care before making the state the 15th with legal sports gambling. Bills to allow sportsbooks at Washington’s tribal casinos have advanced in both the House and Senate. Each would restrict sports betting to the 29 tribal casinos, which is a flawed approach. Lawmakers have said confining sports gaming to tribal properties would effectively restrain the spread of gambling addiction and other problems sports wagering could bring. However, tribal casinos are scattered across the state, making access convenient for most. More than 90% of Washington’s population lives within an hour’s drive of at least one casino.