In this April 21, 2008 file photo, national flags of the United States, Canada, and Mexico fly in the breeze in New Orleans. Mexico will continue to support bringing Canada into its trade agreement with the United States even if it fails to reach an agreement by the American-imposed deadline of this weekend, its ambassador says. THE CANADIAN PRESS/AP/Judi Bottoni BANFF, Alta. - Mexico will continue to support bringing Canada into its trade agreement with the United States even if its North American neighbours fail to reach an accord by the U.S. deadline of . . .