Jack Riley, the No. 2 at the Drug Enforcement Agency (DEA), signaled support for Donald Trump’s proposal to build a wall along the Southern border in a recent interview centered on hunting down Mexican drug cartel boss Joaquin “El Chapo” Guzman. In an exclusive interview with Yahoo News, the acting deputy administrator at the Obama administration’s DEA agency, discussed why the U.S. government is invested in hunting escaped convict El Chapo, the leader of Mexico’s brutal Sinaloa cartel. Riley explained why El Chapo and his murderous criminal empire are a threat to the United States. The Sinaloa cartel has been...