Since the #Trump administration declared #Europe the new enemy of the #USA, we should answer in kind.
Since the only language Trump speaks is #Capitalism, let's speak capitalism to him. Consumers are the only power in a capitalistic system. Excluding the USA from the conversation will speak volumes.

I for my part buy anything BUT US-Brands. Indefinitely.

The app "BuyEuropean" as a neat little helper in this endeavour.