The Canadian embassy is refuting the CTV report, saying no such conversations about NAFTA ever took place with either campaign.

Late Update: ABC News has more reaction from the Canadian embassy.

Later Update: Meanwhile, a key labor surrogate for Hillary is hitting Obama over the CTV report.

Latest Update: Greg Sargent is reporting similar denials from the Canadian embassy, but with the caveat that discussions about NAFTA with both campaigns has occurred, although none like the one described in the Canadian TV report.