Our Economy is Buttressed by the Stability of our Political System
The Dollar is the default international currency because of it, and the world buys our bonds and finances our debts because the U.S. is seen as the ultimate safe harbor for investments. Our 240 year tradition of a peaceful transfer of political power from one Administration to another without mobs assembling to protest electoral losses - or worse - makes the United States virtually unique in that regard. If that is ever seriously called into question our key status in the world will be shaken as a result, and an international financial scramble to move vast assets outside of our borders will ensue, as wealthy individuals, corporations, and other nation states themselves move to hedge their bets on America.
Trumps threat, and a threat is exactly what it was, to not respect the results of our upcoming national elections has already been broadcast around the world, and it is being duly noted. It is hard to get a solid grasp on the number and manner of ways in which Donald Trump threatens our national interests and those of average citizens, who will ultimately bear the cost for Trump's outsized and hollow bravado.