From this:

A powerful think tank chaired by former Sen. Sam Nunn and guided by trustees including Richard Armitage, Zbigniew Brzezinski, Harold Brown, William Cohen and Henry Kissinger, is in the final stages of preparing a report to the White House and U.S. Congress on the benefits of integrating the U.S., Mexico and Canada into one political, economic and security bloc.

The final report, published in English, Spanish and French, is scheduled for submission to all three governments by Sept. 30, according to the Center for Strategic & International Studies [csis.org].

CSIS boasts of playing a large role in the passage of the North American Free Trade Agreement in 1994 – a treaty that set in motion a political movement many believe resembles the early stages of the European Community on its way to becoming the European Union.

There's much more at the link, and their report is here: canadians.org/water/documents/NA_Future_2025.pdf