It's not a big threat to the US. The US is a net oil exporter, has the Strategic Petroleum Reserve, and, if absolutely necessary, Trump could make up with Canada so those oil imports restart.
Taiwan, Japan, and Korea, though - totally dependent on imports for oil.
Something that most pundits have missed: unlike all other US wars since Korea, the US can't end this war by pulling out. Iran, unlike all US combat opponents from Vietnam to Venezuela, has the demonstrated ability to strike well beyond its borders. This war isn't over until both sides say it's over.
Taiwan, Japan, and Korea, though - totally dependent on imports for oil.
Something that most pundits have missed: unlike all other US wars since Korea, the US can't end this war by pulling out. Iran, unlike all US combat opponents from Vietnam to Venezuela, has the demonstrated ability to strike well beyond its borders. This war isn't over until both sides say it's over.