Just quickly, the first priority is to do no harm. We have a well-integrated supply chain and need to make sure that we don't do anything to undermine that supply chain. The next thing you can do to improve it is to modernize it. NAFTA didn't include things like e-commerce, because it didn't exist. That's one of the ways you can improve upon, but there are lots of others.
On May 4th, 2017. See this statement in context.