President-elect Donald Trump says he will take executive action on day one to impose major tariffs on Canada, Mexico and China. So how will that impact costs for consumers? Mario Parker, Bloomberg News' managing editor of economy and government,

MEXICO CITY — Mexico’s president responded angrily Tuesday to President-elect Donald Trump’s pledge to impose a 25 percent tariff on its products if the country didn’t curb the flow of irregular migrants and fentanyl, warning that the penalties would only wind up causing inflation and unemployment in the United States.