What countries are going to supply food to these American coastal cities sufficient to keep them functioning normally? Has this happened in Caracas? Where is all the Chinese and Russian food for Venezuela?
If the USA is in the thrall of anarchy/civil war, the rest of the world is going to slide into a depression. No country will be loading up ships with enough food to keep the blue hives from imploding.
Ditto fuel deliveries. China and Russia will have their own problems.
The EU will side with the blue state coastal cities. You can count on that. They will deliver the goods to their fellow commies.
If the USA is in the thrall of anarchy/civil war, the rest of the world is going to slide into a depression. No country will be loading up ships with enough food to keep the blue hives from imploding.
Ditto fuel deliveries. China and Russia will have their own problems.
On the other hand, the U.S. has a lot of assets to offer for food. There are significant assets of American corporations abroad, if the people or countries trading for them were willing to take the risk on the Blue side coming out the winner.
But, I suspect you are essentially correct. The U.S. is a major food exporter. Stop that, and the entire world is hurting. Famine in Africa, much of Asia, Mexico, the Middle East, Possibly Europe.