If you force American companies to choose business in America v. business internationally I have a hard time seeing them choose America. I thinkt he end result is that most international companies (Coke, Sony, Apple, Pepsi..) pulling out of America.
Some exceptions I can see are fast food/restaurants and car makers.
This would lead to foreign governments, from less friendly ones to allies, taking reprisal actions such as heavy tarriffs, canceling treaties and allainces. This would lead to America suddenly being very alone and that hamemrs the economy, national security, military...