OK FHN, playing for your side I can think of one way they could try to do this, but unfortunately it wouldn't work. They could break worldwide free trade agreements like the US did with US Steel when they were trying to keep the steel industry alive. It pissed off loads of countries, and could only keep it up for so long.
Could they do that with oil? no. Because oil from different parts of the world is completely different consistencies \ composition. The gas you put in your car is a mixture of about 40% US oil and 60% Other \ Arabian oil. The mixture is controlled in the refraction and processing of the oil. So that is why the US exports and imports oil at the same time. So it would not even be a simple process without redesigning engines to break trade agreements and go it alone.