The administration and Republicans in both chambers have hammered Ms. Pelosi and her caucus for weeks over the delay in allowing the pact’s legislation to go for a vote on the House floor. Even within Ms. Pelosi’s majority, several moderate members and a number of the freshmen responsible for flipping seats and delivering her the majority had begun pressuring leadership for a vote on the pact before the end of the year.
The deal announced Tuesday offered Ms. Pelosi and her core allies justification for the delay by establishing what she said would be a legacy agreement that sets the standard for future trade deals.
The rewrite provides a much-needed update to the trading rules for North America. The original NAFTA, which was negotiated by President George H.W. Bush and signed by President Clinton, went into force on January 1994, before the commercialization of the internet.
Besides updating rules for digital commerce, Mr. Trump’s USMCA has made other changes generally sought by Democrats, like raising the threshold for the proportion of a car’s value that must be made in North America in order to qualify for the pact’s zero tariffs. It also contains provisions designed to strengthen Mexican labor unions and roll back a special system of arbitration for corporations long opposed by Democrats.
With passage into law in the United States, the deal will clear its biggest and one of its last remaining hurdles in a tumultuous two-year negotiation.
Since beginning the negotiations in August 2017, Mr. Trump peppered the talks with accusations that Canada and Mexico were ripping off the United States, as well as frequent threats to withdraw from the pact altogether. He and his advisers pressed for concessions that were opposed by both foreign officials and the business community, including a sunset provision that could have caused the pact to automatically expire.
The Trump administration ultimately watered down some of its more controversial demands and secured the approval of Canada and Mexico late last year. Mexico’s legislature has already ratified the agreement, and in Canada the trade pact is expected to pass into law without controversy.
Elisabeth Malkin contributed reporting from Mexico City.