Mexico,United States,Canada
[DOC] [TLE] North America leaders mount strong defense of trade despite threats ... [PAR] Jun 29, 2016 ... Canada, the United States and Mexico on Wednesday mounted a fierce defense 
of free trade, vowing to deepen economic ties despite an... [DOC] [TLE] Obama heads to last summit with Canada, Mexico - Reuters [PAR] Jun 27, 2016 ...