( December 4, 2015) -- Bill Baer was in his first week as head of the Justice Department’s antitrust division in January 2013 when he had to decide whether to challenge Anheuser-Busch InBev’s proposed mega-deal to acquire Grupo Modelo, the maverick Mexican brewer best known for Corona. He moved quickly, and the department filed a lawsuit charging that the combination of the largest and third-largest beer sellers in the country would jack up prices and undermine competition....