Israeli Prime Minister Yitzhak Shamir made that statement in 2000. Although the impetus was her Senate run, I suspect he had the long view....
With the mentality of the elitist socialist, it seems inevitable (10 to 20 years) for the US to join Mexico and Canada to form North America. The uneducated Americans will not do the work that the Mexicans will do and many retirees will find life better south of the boarder. Then add West Coast/North East white flight to Canada and you have a natural existence.