Mexico City : The Mexican government is confident that a new North American Free Trade Agreement (Nafta) with Canada and the US will take place by December.The government of President Enrique Pena Nieto is hoping to sign an updated version of the 1994 trade accord before his six-year term ends on November 30, Xinhua news agency quoted presidential spokesman Eduardo Sanchez as saying on Sunday."We're working on it. Hopefully this government will get to sign it," Sanchez said on the sidelines of Mexico's Independence Day parade.On August 27, Mexico and . . .