Mexico has been taking a bashing for allegedly serving as a conduit for Chinese parts and products into North America.

Canada wants Mexico to stay in a continental trade pact despite concerns about China possibly using it as a back door to flood the North American market, a source directly familiar with the matter said on Wednesday.

Mexico's president has acknowledged that Canada is concerned about reports of a Chinese company's auto plant in Mexico, but she says it does not exist.

Trudeau said he would prefer the North American free trade agreement to remain in place, but that Ottawa was 'leaving all doors open' to secure Canadian interests.