https://www.nytimes.com/2018/04/29/us/politics/us-allies-trade-war-tariff-negotiations.html

«In terms of the potential disruption to the global economy, the dispute with Europe may be the most critical. The United States and the European Union account for about one-third of world trade.

Only a few years ago the United States and Europe were discussing the possibility of eliminating almost all trans-Atlantic trade barriers. Now they are stymied by fundamentally different worldviews. As the Europeans see it, Mr. Trump is demanding concessions that would make them accomplices in dismantling a postwar trade framework they hold sacred.»