Ukraine files to join NATO which would formally start WWIII

Obviously, you don't run any business since you don't understand basic Capitalism and Geopolitics.

"The top five purchasers of U.S. goods exports in 2019 were: Canada ($292.6 billion), Mexico ($256.6 billion), China ($106.4 billion), Japan ($74.4 billion), and the United Kingdom ($69.1 billion). U.S. goods exports to the European Union 27 were $267.6 billion."

If they stop buying, U.S. companies will go bankrupt and layoff millions of American workers which will cause a deep depression.

Furthermore, foreign countries will make trade deals with other countries. When dummy Trump attacked China with a trade war, they stopped buying soybeans and other produce from our farmers. China found other countries to replace America. Taxpayers had to give billions to suffering farmers and the costs of products went up for Americans because of Trump's lost trade wars.

Trump's isolationism has also caused both China and Russia to dominate in Latin America, Asia and Africa where they have important natural resources and customers. Now they're doing business deals with them instead of us.

It's no accident that Africa and Saudi Arabia recently sided with Russia instead of the U.S. and E.U.

If China, Russia and other countries dumped out Treasuries, our currency would hyperinflate and middle-class Americans would become impoverished.

Foreign countries holding our Treasuries, etc.
https://ticdata.treasury.gov/Publish/mfh.txt

We don't live in a vacuum!!! We're all interconnected which is the reason that Isolationism doesn't work in a global economy and military.