President Trump should renegotiate Nafta in a way that builds upon — rather than hinders — the movement of goods and people between Canada, the United States and Mexico, the head of the U.S. Chamber of Commerce said.

President Donald Trump put neighboring Canada and Mexico on notice: he’s determined to wring out more favorable terms from Nafta. Now comes the hard part of reworking a trade deal that’s framed relations for more than two decades.

President Trump abruptly ended the decades-old U.S. tilt toward free trade by signing an executive order to withdraw from an Asia-Pacific accord that was never ratified and by promising to renegotiate the North American Free Trade Agreement.

President-elect Donald Trump won’t wait for Congress to confirm trade officials to act on his promises to withdraw from the Trans-Pacific Partnership trade deal and give notice he will renegotiate Nafta, press secretary Sean Spicer said.

WASHINGTON — The co-author of President-elect Donald Trump’s infrastructure proposal told senators that enhancing transportation networks would produce high-paying jobs. On trade, he added that the new administration would quickly examine the North American Free Trade Agreement.

A truck driver pauses at one of the few intersections in the border area of Santa Teresa, New Mexico, as he tries to navigate a narrow turn while transporting a giant wind turbine blade.

MEXICO CITY — The U.S. Chamber of Commerce told a closed-door gathering of Mexican and American corporate and government leaders that it is aiming to keep Donald Trump from fulfilling his campaign threat to tear up the North American Free Trade Agreement, according to three people with direct knowledge of the matter.

Trucks carried almost two-thirds of the freight moving between the United States and its North American Free Trade Agreement partners Canada and Mexico in September, and continued to be the most heavily used mode, according to federal TransBorder Freight Data released Nov. 29.

Trucks continued in July to be the most heavily used mode for moving goods to and from the United States and both its Nafta trade partners, Canada and Mexico, hauling 64.7% of the freight, the U.S. Department of Transportation reported Sept. 22.