Here in America, over the decades, we have seen many egregious departures from the founding principles of our form of government. You can't deny that.
Any bloomin' idiot can see that if you don't secure your borders that invaders that have no common cause with the indigenous people, and actually harmful thereto, will flood same. The border isn't secure, even though many years and countless opinion polls indicate the vast majority of people support it.
We have documented meetings of our executives with the executives of Canada and Mexico, wherein consolidation of the countries was discussed. The documentation, both linked and verbatim has been posted on FR several times so surely you must have seen it.
We have an official .gov (I pretty sure it was .gov, I could be wrong) website that organized action toward North American Regionalization. We have public statement of government and economic officials over the past thirty years that clarify desire, need and compelling interest in regionalizing North America.
It is only a short conceptual distance to a consolidated currency. Under this rubric, a consolidate currency not only makes sense but is required.
There are entirely too many interests a consolidated region would serve, financial, economic and production to be had from human resources managed under stricter limits on liberties.
I believe you must look at vectors rather than current instances. Any military man would advise his CIC to attend to the potential use of assets rather than the current use thereof to make decisions for defense. The political power, through the law, a willing media and biased education is there and growing.
I'm not going to sit on my arse with the calm conviction that "it can't happen to us". I think it wise to be watchful, for the assignation of "stupidity" does so shift with the winds of time.