As early as January of 2005, high-ranking officials were discussing the best way to sell the idea of North American “integration” to the public and policymakers while getting around national constitutions. The prospect of creating a monetary unit to replace national currencies was a hot topic as well. Some details of the schemes were exposed in a secret 2005 U.S. embassy cable from Ottawa signed by then-Ambassador Paul Cellucci. The document was released by WikiLeaks on April 28. But so far, it has barely attracted any attention in the United States, Canada, or Mexico beyond a few mentions in some...