One quote in this article speaks volumes: 

“How are [Canadians] blocking U.S. exports of milk to them? How are they dumping lumber down here? It just shows what a terrible arrangement NAFTA has been,” Commerce Secretary Wilbur Ross told CNBC Tuesday. 

Given that neither milk nor softwood lumber is covered by NAFTA, this shows that:

1. The lack of senior public service staff to advise the new Trump Administration Cabinet is a serious impediment to rational negotiations between Canada and the US on these two topics.

2. Wilbur Ross (and obviously Trump) don't care that they lack basic facts on these issues and are prepared to bulldozer ahead; Presumably to fire up their base in key States and divert attention from obvious setbacks and miscues that have occurred since Trump took office.