FILE - In this Monday, May 14, 2018 file photo, people make bets in the sports book area of the South Point Hotel and Casino in Las Vegas. Those who deal with compulsive gambling are worried that a rapid expansion of sports betting in the U.S. could cause more people to develop gambling problems. The U.S. Supreme Court on Monday cleared the way for states to legalize sports betting. (AP Photo/John Locher, File)