ATLANTA — YRC Worldwide CEO James Welch and an executive at Union Pacific predicted that tax reform will drive further economic growth and higher freight demand, but voiced concerns about the future of NAFTA and the continued challenge of attracting younger workers during a logistics conference here.

President Donald Trump has pledged to rework trade deals so they benefit domestic workers, but current efforts have sparked concern among industry groups, including trucking.

NAFTA talks are entering a pivotal moment as the U.S. turns up the pressure on Canada and Mexico to radically alter the trade pact in favor of American interests.

The U.S. is running out of patience with Canadian and Mexican resistance to key American proposals ahead of talks next week on a new North American Free Trade Agreement, two people familiar with the matter said.

NAFTA’s about more than tariffs, Bank of Canada Governor Stephen Poloz says in a warning to avoid low-balling the impact of a potential collapse of the trade pact.

The three ministers leading negotiations to revamp NAFTA will get two chances for face-to-face talks this month, including one near the slopes of Davos.

U.S. House Speaker Paul Ryan said the biggest problem with the North American Free Trade Agreement “comes from the North,” with Canadian dairy producers dumping low-cost products on the market to compete with Wisconsin farms.

WASHINGTON — The most likely scenario of what will happen if negotiations to reset terms for the North American Free Trade Agreement are successful — or not — is that President Donald Trump announces, probably via Twitter, a U.S. withdrawal from the deal. This would leave what experts call a zombie NAFTA.

Markets shuddered on signs the U.S. may be preparing to withdraw from NAFTA. But even if President Donald Trump serves notice of a pullout, the trade deal could survive.

Shares of railroad and auto companies were among the biggest decliners after Canadian government officials said there’s an increasing chance that U.S. President Donald Trump will give six months notice to withdraw from the NAFTA trade agreement.