Sports gambling is a form of gambling whereupon a person bets on certain outcomes of a sporting event (the most common are the winner, and whether the winning team will cover the "spread", or the number of points by which the favored team is expected to win).
Prior to May 2018, the federal Professional and Amateur Sports Protection Act prohibited sports gambling everywhere in the United States (except for Nevada which had already allowed it prior to the Act). In a challenge raised by several states, including New Jersey and Pennsylvania which were hoping to legalize sports gambling as a source of governmental revenue, the U.S. Supreme Court in its 6–3 decision in Murphy v. NCAA (May 14, 2018) struck down the Act, leaving the decision on whether or not to legalize the practice to the states.
Sports gambling is considered a big "winner" due to the COVID-19 pandemic and a combination of state laws and a First Circuit federal appellate decision which opened the floodgates to it. The result is more hardship on families that can least afford it.
The worst states -- i.e., those having the most sports gambling -- the following starting with the largest volume of betting on sports: