Casinos are not like Starbucks stores: You really can’t have one on every corner. That’s the word from David Cordish, whose company is opening a huge new casino next month in Maryland. Yet Cordish warns that the expansion of casino gambling can’t go on unchecked forever. A big problem is the attitude of politicians nationwide who view casinos as free money. “I don’t know how we can control the politicians; they certainly don’t understand the word ‘oversaturation,’” Cordish said Thursday. “They think you can have casinos like Starbucks.”If that attitude continues, Cordish said, “it’s going to implode on them.” That...