The supreme court ruled today that PAPSA (Professional and Amateur Sports Protection Act) is illegal. This will pave the way for legal sports betting in the USA outside of Las Vegas. The federal government could still regulate sports gambling, but not in the way that PAPSA was worded. For the time being various states are going to regulate sports gambling as they see fit, but I would not be surprised if the sports leagues lobby for a federal regulation on sports gambling. Not banning it but just regulating it in certain ways (potentialy having an integrity fee go to the leagues to monitor sports gambling).
Supreme Court Opinion: https://www.supremecourt.gov/opinions/17pdf/16-476_dbfi.pdf
Supreme Court Opinion: https://www.supremecourt.gov/opinions/17pdf/16-476_dbfi.pdf