Thats because you don't understand it Dan. Drugs are a 135 billion dollar industry in America. In Canada the drug industry tops out at 5 billion. They import another billion from America. They couldn't supply Detroit with American drugs from Canada. That's not getting out to the voters, particulary the seniors. All anyone hears is "Same drugs are cheaper in Canada."(subsidized, I know) and "Why do they cost more here?".
It's not going over well as far away as 100 miles from the border.