...I'm just against it being done without our consent.
If it's used to drag our labor laws, our environmental rights, and our political freedoms down to the level of Mexico, then I'm against it. If it's used to dismantle Canada's health care system, I'm against it. If it's used to empower the wealthy elite at the expense of the common man, then I'm against it.
A more complete union, for the right reasons, would be a very good thing. I just don't trust this current crew, at least in the United States, with having my best interests at heart.