The is not a straightforward question to answer. The answer is yes if the store will ship to the USA and no if they won't (we don't have any partners that live in canada).
Even if the store will ship to the USA from Canada there are a few complication:
All of these mean that it is really only worth buying from a canadian store if they are the only place that has the particular item you want and you are not concerned about the cost. It will almost always work out cheaper to order from a USA store rather than a Canadian store.