An awful lot of business decisions depend on the expected price of the materials and equipment your business needs, and/or what market price you can expect to be able to charge for whatever it is you plan to sell. Tariffs this sweeping will make both of those things much harder to predict for almost every business in the country soon.

The federal government does a lot more than dictate tariffs. There's immigration, monetary policy, war spending, etc. And Trump is not afraid to bully governors, so state policies will also be affected.