>
with coastal accessAt a finer grain, looking at the top 20 CSAs[1], many are non-coastal, but to my guesstimates only 20% are not on a navigable river:
7 8'000'000 Dallas-Forth Worth
11 6'900'000 Atlanta–Athens-Clarke County–Sandy Springs (160 km to Columbus)
13 5'000'000 Phoenix-Mesa
17 3'600'000 Denver-Aurora
(Boston-Worcester-Providence is almost as large as my entire country, and has far better water transport options.)
> ... and we have what's left of the United States. Not a great scenario if you follow it to its conclusion
Why not? While "Civilian aircraft and aircraft engines" probably takes a hit, the remaining US should continue to have its major exports:
1 Food, beverage and feed: $133 billion. Soybeans were the number one product in this category, with sales of $22 billion, followed by meat and poultry at $18 billion.
2 Crude oil, fuel and other petroleum products: $109 billion.
(and I'm pretty sure all three of those categories are things the chinese are currently importing?)
[1] by population. Anyone have a source for GDP?
https://en.wikipedia.org/wiki/Combined_statistical_area
[2] https://money.cnn.com/2018/03/07/news/economy/top-us-exports... (2017, anything more recent?)
Colorado I wouldn't believe: unlike the west coast, they're tied into the national pipeline network. (On the gripping hand, it, like many other states, is on the western electrical grid.)