Latest NAFTA Talks End In Disappointment As Attendees Question Lack Of U.S. Engagement

President Trump has threatened a quick termination of NAFTA a countless number of times, with the latest coming just last weekend via twitter:
We are in the NAFTA (worst trade deal ever made) renegotiation process with Mexico & Canada.Both being very difficult,may have to terminate?
— Donald J. Trump (@realDonaldTrump) August 27, 2017