Deputy Prime Minister of Canada Chrystia Freeland, second left, acknowledges the applause as Mexico's top trade negotiator Jesus Seade, right, Mexico's Treasury Secretary Arturo Herrera, second right, and Mexico's President Andres Manuel Lopez Obrador, left, applaud 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)