U.S. and Mexico tentatively set to replace NAFTA with new deal

President Donald Trump talks on the phone with Mexican President Enrique Pena Nieto, in the Oval Office of the White House, Monday, Aug. 27, 2018, in Washington. Trump is announcing a trade "understanding" with Mexico that could lead to an overhaul of the North American Free Trade Agreement. Trump made the announcement Monday in the Oval Office, with Mexican President Enrique Pena Nieto joining by speakerphone. (AP Photo/Evan Vucci)

WASHINGTON — Snubbing Canada, the Trump administration reached a preliminary deal Monday with Mexico to replace the North American Free Trade Agreement — a move that raised legal questions and threatened to disrupt the operations of companies that do business across the three-country trade bloc.