Update on: Campaign 2016 updates: Donald Trump vows that Mexico will pay for a wall along southern border

Campaign 2016 updates: Donald Trump continues vow to build wall and have Mexico pay for it Aug. 31, 2016, 8:48 p.m. Differing narratives have emerged over whether Donald Trump and Mexican President Enrique Peña Nieto discussed who would pay for a U.S.-Mexico border wall.Trump says in his big immigration...