Well, it was bound to happen at some point. I mean, were already slowly becoming a nation of degenerates hahaha!
So basically what was prohibiting states from running sports books was just deemed illegal by the Supreme court.
"The law the decision overturned — the Professional and Amateur Sports Protection Act — prohibited states from authorizing sports gambling. "
You can read all the detail here:
https://www.nytimes.com/2018/05/14/us/politics/supreme-court-sports-betting-new-jersey.html
Regards,
Mitchell J