President-elect Donald Trump on Monday pledged tariffs on the United States' three largest trading partners - Canada, Mexico and China. The proposed tariffs would affect a wide range of industries, including oil,

Trump said he will impose a 25% tax on all products entering the country from Canada and Mexico, and an additional 10% tariff on goods from China, as one

If tariffs make those imports 25 percent more expensive (or if the flow of oil across the border slows or ceases in response to the new trade barriers Trump wants to erect), prices are likely to rise through the rest of the supply chain, including at the pump.