All of the weed transiting the Canada/US border is flowing from Canada into the US. Canada legalizing weed will have little to no impact on that, except reducin

All of the weed transiting the Canada/US border is flowing from Canada into the US. Canada legalizing weed will have little to no impact on that, except reducing the risks for the Canadian growers. Legalization in several US states, especially Washington and California has already killed most of that trade though. There is plenty of weed being grown in the US now, and it's much easier to move it between states than it is to move it over a border.