The Port of Vancouver is facing strikes by longshore workers this week for the first time in 20 years. The dispute comes just as traffic growth across Canada has picked up. Vancouver’s containerized freight handling climbed 12.5% year over year in April while that through Port of Prince Rupert surged 20.0% higher and Montreal’s rose 8.3%. An extended strike may lead shipping firms and their customers to reconsider their traffic patterns, perhaps including Seattle-Tacoma on the west coast as well as Prince Rupert. Retailers are particularly exposed to disruptions heading in...