Whoever praises the EU clearly is clueless. Seriously, if your NAU is going to be anything like the EU, prepare for decades of hilariously decapabilitating bullshit.
The analogy, however, isn't so far from the truth, because a union of the U.S. with Mex "failed state" ico would be quite akin to the EU's inclusion of Rom "failed state" ania, and so on.
Another point if one of the three has economic problems the other two will support them and keep their economy strong.
How it's worked in the EU so far: if one has problems, he drags all the others down with him.
The problem with the Mexican border would be solved, open borders not exactly the way the people want it resolved but with a better economy in all three countries including Mexico would make it less desirable to switch.
How it's worked in the EU so far: An ever-increasing brain drain of capable people from the poor (CEE) states to the economically capable ones.
All labour that requires no absolutely outstanding expertise being moved to low-wage, low-proficiency nations, facilitated by open borders and EU trade agreements.
A downwards levelling spiral in standards - standards always find the LOWEST common denominator, not the highest. Thus, the standards of nations such as France or Germany are slowly being slashed to meet those of Poland, Albania, Romania and so on.
Our combination of politics would also help get a much better understanding of each other and I feel we would become better friends.
How it's worked so far in the EU: Everyone panicking about their national identity; all member nations frantically trying to con each other out of little subsidies; politicians using the EU to force through decisions that would be unpopular at home.
Along with an even more terrifying military having the U.S being the most powerful military on the planet would be able to cut down our spending on the military and even size it down due to the increase in size of the newly combined force.
You already have the largest military force in the world, and spending cuts have been called for for decades. The political will simply isn't there, and no NAU in the world will make it happen.
What seems to be far more likely is the collapse of the current United States, though probably not anytime soon. It will most likely be after some form of war over economic issues, probably involving some Asian countries (probably China) against forces of the EU and United States combined
I don't really buy this. the mutual economic stakes EU/USA and China have in each other are simply too high for war to happen. I'm no fan of China, but realistically speaking, they're not the baby-devouring slit-eyed devils they're made out to be. They're not just gonna up and hurl nukes at the U.S., or encroach on designated U.S. colonial territory. China is an important factor in keeping the U.S.', and thus by extension the EU's economy alive. Why would these three forces go to war with each other? The only possible, valid reason is control of resources, and all parties involved have long since found out that (direct) armed between major players conflict is an idiotic, because costly approach to that.