No.  I object to a North American Union because it is a contrived vehicle for the United States to control and "americanize" the entire continent in order to pillage all of its natural and human resources.  The present NAFTA agreement bears witness to the fact that the US has already  manoeuvered itself into a feudal  mindset of entitlement  to anything it wants to access from the economy of the two other signatory countries who have no equitable means or rights to challenge its takeover.  The American government refuses to recognize the need for or to impose necessary  ecological restrictions on itself.  It acts primarily in its own economic interests without accountability for the impact on other nations.