Harley Davidson was one of these companies. They weren't doing well before they got caught in the middle of this trade war, since the "biker" culture it aimed at was shrinking globally, so in a move to survive they decided to move production to South America. Turns out their audience didn't like this move, and its death accelerated.
TL;DR: Trump put a tax on European steel, and the EU snipped Harley Davidson in retaliation.