The North American Union (NAU) is a theoretical economic and political union of Canada, Mexico, and the United States.
The concept is loosely based on the European Union, occasionally including a common currency called the Amero or the North American Dollar. A union of the North American continent, sometimes extending to Central and South America, has been the subject of academic concepts for over a century, as well as becoming a common trope in science fiction. One reason for the difficulty in realizing the concept is that individual developments in each region have failed to prioritize a larger union.
Some form of union has been discussed or proposed in academic, business, and political circles for decades.[1][2][3][4] However, government officials from all three nations say there are no plans to create a North American Union and that no agreement to do so has been signed.[5][6][7] The formation of a North American Union has been the subject of various conspiracy theories.[8][9][10][11]
I guess that makes Petraeus a lone nut.