The economic consequences, for the U.S and the world, are disastrous. Economies today are interdependent, and as we know, Trump and his band of merry morons have no conception of what foreign policy is.
Their stupidity could drive not just us, but a better part of the globe, off an economic cliff.
What is worse is that if people like him remain in power in the UK, and take over in France and other European countries, I don't want to even speculate what the results will be.
It is, doubtless, the scariest thing we have ever confronted.