the entire thing could certainly collapse, within just the last hour we've heard from mexico's president and the foreign secretary saying they will not accept what they call this hidden provision, and so while the deal might not be totally at risk, it is certainly less of a sure thing than it was last week. with the strokes of three pens, a new usmca trade deal was signed last week in mexico city. more than just a trade deal, though, for the u.s. it was a moment of rare bipartisanship. though it still needs to pass congress, robert lighthizer called it a model for future trade deals. president trump called it historic and house speaker nancy pelosi agreed. >> it's a victory for america's workers and one we take great pride, great pride in advancing. >> reporter: u.s., mexican and canadian negotiators first agreed on a new deal but house democrats had concerns including about mexican labor. through a year of negotiations with the white house they