"We have a plan! Well, actually, it's a plan for looking at two considerations for more looking at a consideration for a plan."
P.S. It seems to me that, at the very least, Canadian authorities should be compiling a list of big rigs that have been clearly identified as actively participating in these blockades, and pass on that info to U.S. Customs and Border Protection (CBP), with the understanding that those vehicles will be permanently barred by the CBP from entering the U.S. ever again.
You don't need to threaten anyone or even move any trucks -- just make a list and hand it over quietly, whereupon those truckers will learn of their problem the next time they try to enter the United States and find out that's not happening.
The best part is that there is very little recourse for such truckers; the CBP has proven over the years that it can be quite arbitrary in its decisions, and it certainly won't put up with truckers blocking entry into the U.S. for the purpose of arguing with them.
This should be happening as we speak and, if it isn't, there better be a good reason why not.
P.P.S. The above does not just apply to big rigs; it should also include all those pickup trucks and SUVs. After all, we would hate to discriminate.