I am sure of this..this time..Many of the states bordering Canada get a large Asian..as well as a lot of people from all over the globe..doing what i said..taking tour buses or renting a car out of Canada. Not 90% but i bet it’s a lot more than folks think.
Tourists I can see - I think it is easier to get into Canada from other countries. Or it might have something to do with Duties, etc.
Lots of Chinese moved to Vancouver, B.C. from China. After they had driven up the home prices there they moved south to Seattle with their suitcases full of cash. (And drove up prices here too.)