Canadians who are marijuana users will be banned fir life from entering the United States. If a border patrol agent asks you if you smoke weed, they can ban you from entering the country.
The banned will be permanent if the Canadian smoke weed. Senate Hearing Committee quoted "They're basically turned around, told to go back to Canada, and told they are inadmissible for life."
Canadians will have a chance to enter the U.S. by a waiver to gain entrance. Waivers are expensive and bureaucratic hassle.
The ban includes celebrities and wealthy individuals from entering the U.S. also.
If a border patrol agent ask you "if you smoke weed", don't answer or say no!
Everything you need to know about marijuana from Livin' Weedy.