Last month, four automakers, including Ford, made a voluntary deal with California to make cars cleaner and more fuel efficient. Trump isn't happy with the deal.

source https://finance.yahoo.com/m/b2edc9f5-9308-3813-b7f1-4610566be2f3/ford-earns-trump%E2%80%99s-ire-by.html?.tsrc=rss