Create an EU-like Union called the North American Union (NAU) of Mexico, Canada, and the USA

Create a North American Union (NAU) similar to the EU to create more unity an foster economic growth between Canada, Mexico, and the USA. This Union would have a shared passport between the 3 countries and a shared tribenificial economic policy for the 3 countries, this would add to the economic policies of NAFTA and give legitimacy to the millions of Mexican immigrants already living in the United States, thank you for your time