British sportsbook William Hill has announced that its US subsidiary WilliamHill US Holdco Inc. has struck a deal with NJ racetrack Monmouth Park to be their exclusive sports betting provider as well as sponsor the $1 million Haskell invitational horse race set to run later this summer on July 28th. The move by WillHill highlights that many in the gaming industry strongly believe it is a matter of time until New Jerseyans are able to bet legally on sports; the state is currently in federal court over the issue in a case raised by the professional sports leagues and the…