Canada is the most significant source for U.S. energy imports -- EIA

This report from the Energy Information Administration finds that Canada has been a significant component of the global energy trade due to its proximity to and trade with the largest energy consumer in the world, the United States. Canada maintains a surplus in all sellable energy commodities, exporting crude oil, natural gas, coal and electricity. The country is the most significant source for U.S. energy imports. The United States has traditionally provided the markets for Canada's energy exports. However, Asian countries are seeking greater access to Canada's natural resources to fuel Asia's own long-term economic growth.