From the Journal of Commerce:

Three ILWU Canada locals held an informational picket in Prince Rupert to protest the arrival of the vessel King Felipe, which was partially loaded earlier in the week by non-ILWU labor at the United Grain terminal in Washington state. The Canadian dockworkers, however, finished loading the vessel Tuesday.

ILWU Canada leaders said at the rally in Prince Rupert that they are concerned because employer lockouts in the U.S. could potentially migrate north.

More at the Journal of Commerce