Andres Manuel Lopez Obrador will likely become Mexico’s next president at a time of mounting concern over corruption and violence, but his reform plans are hazy.

Federal investigators in Brazil have uncovered corruption at the highest levels of the government and in the country’s largest corporations.

Miguel Diaz-Canel, set to replace Raul Castro as president of Cuba after sixty years of Castro rule, will be faced with the challenges of implementing economic reform and sidestepping regional isolat…