In the video linked to below Mitt Romney clearly states his opposition to a North American community. He says the idea of a North American community "has no merit whatsoever". Mitt Romney says that if he is president "we will not in any way release our sovereignty or diminish it, either by eliminating borders or checkpoints or by building a super highway or entering into treaties like the Law of the Sea Treaty that removes some of the most important elements of our sovereignty".

VIDEO: Romney says NO to North American Community
http://www.youtube.com/watch?v=Oy8r5yCLLj4