The pushback from American vehicle producers and the possibility of retaliation from Europe creates a strong incentive for the President to consider backing down.

The President has backed down from controversial ideas in the past like his proposal for a 25-cent gasoline tax to fund infrastructure. Republican politicians and even Transportation Secretary Elaine Chao weren't on board with the plan, and the President has seemingly dropped the idea because there was been little mention of it since then.

"President Trump always asks for or wants everything but that is how he deals. The Art of the Deal book points this out," Sullivan told Motor1.com. "He always asks for 100% but the reality is, he will settle for something fair. He's a hard bargainer. I don't expect to see doomsday-like things happen. Trump just won't step on the auto industry like that, I hope."