Bush knows what he is doing. He's not stupid.
This is about Globalism. I'm pretty sure about that. "Free Trade", the free flow of goods and peoples across boundaries, the "trade of the Americas", a "Pax Americana", and later an Americas styled currency.
Time will tell if things go in America's favor, but I wouldn't count on it.
The second lat in trilateral? The Amero? Followed by a pacific or Asian grouping with one currency.
Then down the road a few years, why hey, we don't need three currencies. And since there are only 3 currencies we should all just use one currency. So much easier, and so much easier to implement now!