Did Trump's proposal come with a time machine? Because Trump started talking about his proposal in June 2015(when he announced his candidacy). And, here is an article from March 2014, which discusses Ford's move of truck lines from Mexico to Ohio:
http://www.bloomberg.com/news/articles/2014-03-07/ford-to-move-pickup-production-from-mexico-to-ohio-van-plant
So, tell me again, how is it that Trump's proposal "did the trick"?
Well the recent news is that Ford was scrapping its plans for the 2.5B plant in Mexico. That was the headline. If that news is accurate, then it has nothing to do with Ford moving truck lines to Ohio. It can only be attributed to Trump’s frontrunner status and his credible threat to put a hurt on Ford if they continue building plants in Mexico.