@cbsnews: President Trump says Americans could feel "some little pain" after he signed an executive order that imposes 25% tariffs on imports from Canada and Mexico, while adding an additional 10% levy on goods from China. Experts warn that the impact of the tariffs could affect the economies of Canada, Mexico and China — the nation's three biggest trading partners — as well as the U.S. itself. #tariffs #trump #canada #mexico #china