Kalshi criminally charged in Arizona for operating illegal gambling business
reuters.com
reuters.com
Last time I checked the differentiator is whether skill is involved.
If you view it in those terms, it's really not much different than the stock market/broker relationship. Surely someone will say 'well at least stocks are ownership', let me introduce you to derivatives.
The real question I guess is how we come to terms with house gambling/prediction markets/stock markets being three sides of the same coin and how to regulate that.
Having puts for stuff you do not have. Or buying calls from someone who does not have it just feels pure speculation thus gambling not hedging.
This is why Kalshi will win in the end. There's way too much money at play for this to turn into a slippery slope for Wall Street.