2. President Trump said it was “possible” that the U.S. would pull out of Nafta, despite urgings to the contrary from Prime Minister Justin Trudeau of Canada. Above, the two leaders with their spouses.

The pact appears to be edging toward collapse as negotiators from Canada, Mexico and the U.S. gather for another round of talks in Washington. Nafta’s demise would send shock waves throughout the global economy, inflicting damage on manufacturing, agriculture and energy.

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