US President-elect Donald Trump has said one of his first acts will be to slap 25% tariffs on Canada and Mexico, a move which would cause havoc for two of America's key economic partners.Canada and Mexico are grappling with US President-elect Donald Trump's threat to place 25% tariffs on exports into their most important trade market,

MEXICO CITY — In recent days, Mexican President Claudia Sheinbaum has touted her country’s largest-ever seizure of fentanyl and highlighted multiple crackdowns on migrants headed toward to the United States. She was speaking to the press, but her most important audience is U.S. President-elect Donald Trump.