The Wall Street Journal: USMCA takes effect but North American trade tensions remain

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The U.S.-Mexico-Canada Agreement kicks in Wednesday, but the culmination of years of negotiations won’t necessarily mean the end of trade tensions among the three North American nations.

Even as the deal formally takes effect, contentious issues that prolonged the negotiations are re-emerging as sore spots—including U.S. tariffs on metals, Mexico’s labor standards, Canada’s protection of its dairy market and new rules on automotive production.