Mexico's Treasury Secretary Arturo Herrera, left, Deputy Prime Minister of Canada Chrystia Freeland, second left, Mexico's President Andres Manuel Lopez Obrador, center, Mexico's top trade negotiator Jesus Seade, second right, and U.S. Trade Representative Robert Lighthizer, hold the documents after signing an update to the North American Free Trade Agreement, at the national palace in Mexico City, Tuesday, Dec. 10. 2019. (AP Photo/Marco Ugarte)
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