Funnily enough only about 11% of US oil imports actually come from Saudi Arabia most comes from Canada who accounts for around 40% of imports.

Because US position is to use the least costly sources of oil first, and that this should also lean towards using up the oil in foreign countries ahead of our own, so we run out last.

I'm not saying I support this position, only that it seems to be what it is.

I feel like you're saying this sarcastically, but you should be saying it earnestly.

In general, people don't ship oil around the world for no reason, which is why US oil tends to come from the Americas.