The vice-president linked the future prosperity of the US energy sector to approval this year of the agreement.
The VW factory in Puebla, southeast of the Mexican capital, had long been the only plant in the world still manufacturing Beetles.
Department of Commerce determined Canadian exports do not warrant the tariff.
Trade fights with China, Europe and Mexico, as well as an increase in the greenback’s value, have cut into US exports.
Canadian MPs are to adjourn soon for their summer recess, but could be recalled in the summer to deal with USMCA ratification.
Use of tariffs is alarming some groups who are disengaging active support for the Republican party.
Mexican and U.S. officials reached an accord late Friday that calls on Mexico to crackdown on migrants in exchange for Trump backing off his tariff threat.
Without a deal, the first tariffs are to go into effect June 10.
Runs counter to a firmly rooted orthodoxy and viewed as nothing more than taxes they strenuously oppose.
Tactics on display in social media respond to an economic and diplomatic emergency.
Trump’s Republican allies warn the tariffs on Mexican imports will hit US consumers and harm the economy.
New law requires secret-ballot union votes and proof of workers’ consent for contracts.
Move would block incoming shipments of fruits and vegetables, TVs, medical devices and other products.
Wants a package of labour reform ratified in Mexico’s Congress before its April 30 adjournment.
Bitterness over US-Mexico trade pact last August.