She skewered him for talking out of both sides of his mouth on NAFTA (an Obama adviser seemingly assured the Canadians that he was not really threatening to tear up the trade deal).

The rapacious expansion of China’s exports has come at the expense of others, including Canada, the third NAFTA member (see chart).

But in the Ohio and Pennsylvania primaries he saturated the airwaves with ads denouncing NAFTA for devastating entire American cities.