Interesting question. Among other things our overall standard of living would be lower because we would be spending more for the same goods than we do now, and the people who today produce the $2T in exports would be out of work because it's folly to think we can continue to export if we block imports.
Lol, complete BS. In 20% of Amnerican families, no family member is employed. And in 20% of US families, the head of household is on one or more of the many means tested government poverty programs. We now spend more than a trillion per year on those means tested poverty programs.
That's where all those great 'savings' from imports from cheap labor nations can be found. We'd be many hundred billions better off with far more manufacturing jobs in the US and many beneficiaries of those poverty programs working in those jobs instead of receiving benefits.
Real employment is around 20% and we have no hope of balancing the budget until that figure is greatly reduced.