i recently built a computer over amazon & newegg

it was frequently the case that i would purchase items on amazon.ca and have them shipped to me through the united states. i could have purchased them over amazon.com for minimal differences - if i could buy the gift cards here, or if i had a credit card.

the functional difference lay only in where the domain was registered.

the reality is that large amounts of goods purchased online are manufactured neither in the united states or in canada. sure: it would make sense to better integrate the distribution network, which is what actually exists on this continent. but, that's not really an argument to knock down tariffs, and you don't really need to do so to maximize efficiency in distribution.

don't let them trick you into using good ideas to push through bad ones.

http://www.cbc.ca/news/opinion/cross-border-shopping-1.4226427