Mexico's president has accused the US of harboring drug cartels and American citizens of working with organized crime groups in Mexico, in a riposte to Donald Trump's allegation of an "intolerable alliance" between traffickers and her government. "There is also organized crime in the United States and there are American people who come to Mexico with these illegal activities," Claudia Sheinbaum said during her morning press conference on Thursday. "Otherwise who would distribute fentanyl in the cities of the United States?"