Is capitalism was still a thing in the US for this scenario? How many agri businesses would need to burn huge amounts of produce to keep their profits up without the guarantee of foreign export markets being open to them? With the remaining produce having massively inflated prices for the domestic market, there'd probably be a pretty steep decline in public health.

Potentially less production due to a huge need to have the entire working age population conscripted into the military as combat arms occupations and sent abroad.