The Financial Post reports in its Saturday edition that Mexican Economy Minister Ildefonso Guajardo says it could be "days or weeks" before Canada is invited back to the North American free-trade agreement bargaining table. The Post's Tom Blackwell writes that Canada is not expected to take part when talks resume Wednesday. Mr. Guajardo said his country and the U.S. have been making a lot of progress, but would be back in Washington next week for a fourth week of two-way talks. Though he had earlier suggested the Canadians could well join them at that point, he was more vague Friday about the timing of Canada's return. He said, "It will depend on these meetings in the next few days and weeks to finish the U.S.-Mexico elements, more particularly the bilateral relationship." Would Canada come in when the bilateral talks are completed, he was asked. "That's the idea," Mr. Guajardo replied. An unnamed Canadian government official says it is widely believed the focus of the Mexico-U.S. sessions has been the American desire to see the vehicles it imports duty-free under NAFTA include more North American-made parts and more content produced by high-wage workers. Canada is expected to agree to much of that.