U.S. Trade Representative Robert Lighthizer speaks during an event to sign 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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U.S. Trade Representative Robert Lighthizer speaks during an event to sign an update to the North American Free Trade Agreement, at the national palace in Mexico City, Tuesday, Dec. 10. 2019. (AP Photo/Marco Ugarte)
