There's a reason so much of our oil comes from Canada, Mexico and increasingly our own domestic resources. Energy policy has been intertwined with security pol

There's a reason so much of our oil comes from Canada, Mexico and increasingly our own domestic resources. Energy policy has been intertwined with security policy since World War I, both for America and, well, every country in the world. Look up Churchill's decision to switch the Royal Navy from safe Welsh coal to foreign oil. This has, at times, lead to some hilarious legal loopholes like the Mexican Merry-Go-Round.