With the U.S. and China seemingly nearing the conclusion of a trade deal, many experts have predicted that Washington could next turn up tensions with the European Union.

But it would be a mistake if the Trump administration decided to impose additional tariffs on European products because of such differences, according to Anthony Gardner, who served as American ambassador to the EU from 2014 to 2017.

“That would be a mistake, if that is the position that Washington is going to take. And the fundamental reason is that when you look at our common concerns — the U.S. and European concerns about China — we probably agree on 90%,” Gardner told.

Gardner said he regrets that the U.S., under the Trump administration, has seemingly chosen to view the EU as foe. He added that the two economies should work together even more, especially when it comes to tackling concerns about China’s trading practices.