The Venezuelan government is investigating an allegation that a Portuguese company funneled millions in unexplained payments to government officials to obtain a contract to revamp and then operate the country’s second-largest port, the Miami Herald and el Nuevo Herald have learned. The allegation is that the company paid out the money, laundered through shell companies, to currently unnamed Venezuelan officials, some of whom live in the United States. In exchange, the company, Teixeira Duarte, was to be granted the opportunity to upgrade the port, build a highway expansion and then operate the…