I would say this is a result of Trump taking back a LARGE portion of Long Beach Naval Base that the Klintons gave to the Chinese. The Chinese were VERY unhappy with losing that port.

Look for this Canadian port to be a big off loading point for Chinese container loads which can then be transported to the US by the large rail terminus also there.

Could it be a staging area like Long Beach? Depends on 'if' the Canadians are as stupid as we were in granting the area a tax free zone and only inspected as the loads come out of it. If they have, then the Chinese could have massive troops and equipment both stored and staged there.

Watch for a beefing up of our Alaskan forces and bases for a sign of an opening of the dance with the Chinese. Same for our assets in Japan and Korea. Both of these would be in quick strike range of China.