Trump’s promise to impose 30% tariffs on imports from Mexico and 35% on imports from Canada beginning tomorrow could hammer up to three-fourths of their U.S. imports.

The imbalance in President Trump’s treatment of America’s closest trading partners may come from his desire to make Canada the 51st state, some Canadians believe.

By May Angel, Helen Reid and Jessica DiNapoli LONDON/NEW YORK (Reuters) -U.S. President Donald Trump's trade tariffs are meant to boost domestic manufacturing. But in the chocolate industry, they're doing the opposite: ramping up the cost of importing already-pricey cocoa and hurting the competitiveness of local factories versus Canadian and Mexican outfits that supply the U.