Symbiotic relationships are the healthiest. There's nothing wrong with an equitable balance of trade. Both parties benefit with this kind of an arrangement.
We've always been able to settle our differences with our neighbors to the North in an even handed way going back to Maine's war with Canada back in the early 1800's. Some troops on both sides might have died due to accident or disease but none suffered gunshot wounds. We're kindred to one another.
Pity the three poor Canadian souls attacked by a bear at the Battle of Caribou. A grave misunderstanding that almost resulted in a shooting war between the two sides.