There are multiple revenue streams spread across numerous companies... On the beef side of things, when the ban on Canadian beef into the USA was in full force, there were many (quite a few) feed lots and meat packers through the American prairies, Montana, Idaho, etc. that were severely impacted.
In fact, one of the Canadian companies that competed with the aforementioned was able to buy an entire meat packing plant (essentially new) from one of these distressed US companies for pennies on the dollar. The Canadian concern physically moved it North of the border and sold their product right back into the States.
My point is that the harm from silly, politically motivated gvt actions affects a broad spectrum of people. The goals of any of these people are no different, regardless of which side of a border that one resides in.