A compromise agreement on a bill authorizing sports betting in Massachusetts was reached Monday, which could be the final piece of the puzzle when it comes to horse racing returning to the Bay State. Behind the scenes, a group of investors has been working to open a new track in the state ever since Suffolk Downs closed its doors in 2019, but understood that their plans would not be practical without there being a source of revenue beyond what can be made off of selling bets. With sports betting about...