North American Union

The North American Union (NAU) is an incredibly cool idea a theoretical (specifically, conspiracy-theoretical) union of Canada, the United States, and Mexico in an oppressive Satanic theocracy as a precursor to One world government and the New World Order. Gay marriage will abound, dogs and cats will live together, and Real True Patriots will be thrown into FEMA concentration camps.

The NAU will allegedly come into existence with the assistance of unusually wide highways and badly-named currencies.

Amero
There is just about zero evidence for the proposed Union, but believers in the theory love to talk about the Amero, a fictional currency designed to be an eventual currency for such a union. One proposal for the Amero comes from a speculative paper written by an economist for the Fraser Institute, a libertarian Canadian think tank, in 1999. However, it currently exists only as an artist's rendition.

NAFTA Superhighway
This is the supposed superhighway that will connect the countries. It's non-existent unless by NAFTA Superhighway, you mean I-29, I-35, I-5 and I-94.

CFR paper
Another big piece of evidence is a Council on Foreign Relations report calling for increased economic cooperation and intelligence sharing among the three countries, but as the CFR is a non-governmental organization, this has no bearing on US policy. Conspiracy theorists often claim that this paper proposes a blueprint for a total political union between the three countries, but if you actually look at the proposal, it doesn't say anything about an NAU. It would essentially be similar to a customs union--no tariffs between members, common tariffs for goods coming from outside the union. Curiously, another recommendation in the paper is updated and tighter border security, which should make the wingnuts happy in theory. Also, how it never seems to occur to a NAU believer that such a union would be dominated culturally, politically, and economically by the United States is something of a mystery.

SPP
The Security and Prosperity Partnership (SPP) was an initiative to hold more diplomatic meetings between the US, Canada, and Mexico to work on economic, security, and environmental issues. Its recommendations were non-binding. The SPP, while held up as evidence for the NAU, can't be evidence since it no longer exists as of 2009.

Proponents
In spite of the fact that it's an incredibly unrealistic idea that would never be agreed to by any of the proposed member countries, the NAU is a popular far-right boogeyman, and the theory is a favorite of several Fox News commentators, including noted anti-Hispanic ideologue Lou Dobbs and general wingnut Glenn Beck as well as occasional guest Jerome Corsi. It was also promoted by none other than Phyllis Schlafly. G. Gordon Liddy is not an NAU fan either. The occasional mention of the NAU will get tossed around fringe moonbat anti-NAFTA blogs and it's also something of a staple on general conspiracy sites promoting NWO, Illuminati, or international Jewish conspiracy theories.

Thirteen state legislatures have actually passed anti-NAU or anti-NAFTA superhighway declarations and a bill against the NAU was proposed in Congress but never passed.

Much of the theorizing seems to be driven by anti-immigration and xenophobic sentiment. The rhetoric is reminiscent of communist world government and anti-United Nations conspiracy theories peddled by the John Birch Society.