I find your commentary one-sided and simplistic in the sense that you seem to assign all power of decision to Trump and his administration. But there are three complete negotiating teams from three countries meeting together, and the outcome will surely be determined by them. No one country, much less one individual, can "pull the plug" on NAFTA because it is a trilateral agreement. Lots of contentious issues have developed over the years, which no doubt the current talks will aim to solve. But all three countries have indicated that they are prepared to walk away from a deal which is disadvantageous to them. So, like all agreements and renegotiations of agreements, there will have to be something good for each country for them to sign on. The whole thing will be much more interesting and unpredictable than you suggest.