Huh. I actually thought they'd have a pretty good idea of what public comments would run like, just based on the past election.
But always a good idea to re-visit things like this after they've run for a quarter of a century or so... see what the results turned out to be for good and for ill, see if the situation needs to be tweaked, abandoned, upgraded, etc.
I suppose the younger folks don't even know what it was like before all of this huge change after NAFTA, but many of us remember many decades of American life before, so notice all the change.. often felt so personally.
Just had to go look it up for accuracy, but remember Ross Perot and his famous "...GIANT SUCKING SOUND..." phrase? 
Here's what he thought would happen to us if NAFTA were allowed:
The "giant sucking sound" was United States presidential candidate Ross Perot's phrase for what he believed would be the negative effects of the North American Free Trade Agreement (NAFTA), which he opposed:
The phrase, which Perot coined during the 1992 US presidential campaign, referred to the sound of US jobs heading south for Mexico should the NAFTA, the proposed so-called free-trade agreement, go into effect.
In the second 1992 Presidential Debate, Ross Perot argued:
"We have got to stop sending jobs overseas. It's pretty simple: If you're paying $12, $13, $14 (this was almost a quarter-century ago) an hour for factory workers and you can move your factory South of the border, pay a dollar an hour for labor,...have no health care—that's the most expensive single element in making a car— have no environmental controls, no pollution controls and no retirement, and you don't care about anything but making money, there will be a giant sucking sound going south.
...when [Mexico's] jobs come up from a dollar an hour to six dollars an hour, and ours go down to six dollars an hour, and then it's leveled again. But in the meantime, you've wrecked the country with these kinds of deals."
