From Commercial Appeal In just a decade, the center of gambling has migrated from Las Vegas to a tiny Chinese territory an hour’s ferry ride from Hong Kong. The gambling mecca of Macau now handles more wagers than all U.S. commercial casinos put together. But as U.S. gambling companies have remade Macau, Macau has also remade them. Amid a soft regulatory climate in America, U.S. gaming companies have been hit with allegations of improper conduct, including allowing Chinese junkets linked to Asian gangs into Las Vegas. Macau is the only place in China where gambling is legal. Each month, 2.5...