Wisconsin lawmakers hit pause this week on a bill that would allow tribal casinos to launch online sports betting. And while the state hesitates, national prediction markets are already moving in — with no taxes, no local oversight, and no ties to Wisconsin.
The bill, known as Assembly Bill 601 (AB 601), would let the state’s 11 federally recognized tribes run mobile sportsbooks, as long as the servers stay on tribal land and bets are placed from inside Wisconsin. It passed committee and had support from both sides of the aisle, including Governor Tony Evers. But just before a scheduled vote Wednesday, Republican Assembly Majority Leader Tyler August pulled it from the floor.
“There’s no rush,” August said, though he expects a vote early next year. He also said some lawmakers raised new concerns over the weekend, prompting a delay to work through the details.
What’s at Stake for Wisconsin Players?
While state lawmakers stall, platforms like Kalshi and Polymarket are booming. These are federally regulated sites offering “event contracts,” which work a lot like sports bets — users wager real money on things like football games or political outcomes. But here’s the catch: they don’t pay state taxes or follow Wisconsin’s gaming rules.
That matters for the average player. Without state regulation, there’s no consumer protection. If you get stiffed on a payout or have a dispute, there’s no local watchdog to turn to. And all the money you spend flows out of Wisconsin — into the pockets of national operators.
According to Rep. August, that’s exactly what AB 601 is meant to stop.
“If we leave a gray area in state law, national prediction platforms will fill it,” he warned. “This bill keeps activity under tribal agreements, with proper oversight and accountability.”
National Giants Are Watching
DraftKings and FanDuel — two major players in the online betting world — recently left the American Gaming Association and are now focusing on prediction markets, especially in states where mobile sports betting isn’t legal.
They’re interested in Wisconsin, but not on the tribes’ terms. A group representing big-name sportsbooks is pushing for a revenue-sharing model that avoids the roughly 60% cut required by federal rules when partnering with tribes. They argue that rate makes it unprofitable to operate in the state.
Lawsuits and Legal Opinions
Kalshi is already facing a lawsuit from Wisconsin’s Ho-Chunk Nation for allegedly skirting betting laws by disguising sports wagers as “event contracts.” Other states are seeing similar cases.
To head off legal concerns about AB 601, a 15-page analysis was submitted to lawmakers by attorney Ryan Walsh, representing the Forest County Potawatomi Community. His conclusion: the bill holds up under state and federal law and simply updates existing compacts between the tribes and the state.
