The U.S. has agreed to lift its steel and aluminum tariffs on Canada and Mexico, removing major obstacles for ratification of the renegotiated North American free trade pact by all three countries.

The U.S., Mexican and Canadian presidents signed off on the renegotiated North American Free Trade Agreement today, taking the three countries closer to preserving virtually tariff-free agriculture trade.

The Trump administration’s insistence that Canada agree to add a five-year sunset clause to the North American Free Trade Agreement dashed the potential for a high-level meeting in Washington that could have resulted in a final deal, Canadian Prime Minister Justin Trudeau said on Thursday.