What if a RAT president put an oil embargo on Iraq?
You seem confused.
They would have to justify it to the other countries.
The US does not buy most of the ME oil and all an embargo would do is move the sales to Europe and China. The world does not revolve exclusively around the US.
You are aware that the reason for the high oil prices now is a combination of speculation and China filling its own emergency reserve. China is about 75% of the way to filling a 90-day reserve like we maintain.