Trump has trashed America's most important alliance. The rift with Europe could take decades to repair

"From our perspective, Trump saw Europe as an enemy," a senior European diplomat told CNN. "The lasting impact of 'America First' is the US having fewer friends in Europe."

A senior European Union official said the general view in Brussels was that Trump went out of his way to "gradually undo a lot of what the EU was working towards on the world stage," pointing specifically to the Iran nuclear deal and the Paris climate accord. read more