In the latest sign of the high-rollers’ interest in a Toronto casino, Sheldon Adelson, the billionaire gambling magnate and Republican megadonor, has paid a personal visit to Mayor Rob Ford. Mr. Adelson, 79, is the chief executive officer of Las Vegas Sands Corp., one of at least three Nevada-based gambling empires that have expressed interest since the province announced plans to open a casino in the Greater Toronto Area. Read more