What will happen to the US's economy if the Saudi Arabians overthrown the Saudi regime ?

I would like to see our government addressing this very real possibility. While I see some people believe this shouldn't be the topic of discussion, they don't realize if we don't get our oil, the whole country is basically shut down both commercially and individually. Some people equate oil with greed. They don't realize that energy is a necessity of modern life. Its a necessary resource and the lack of it could lead to war, starvation, freezing, and immobility..