Trump Seeks 'Ideological Certification' For Immigrants

US Republican presidential candidate Donald Trump has addressed supporters in a major speech on immigration in the border state of Arizona, just hours after he met Mexican President Enrique Pena Nieto in Mexico City.

He opened his speech on Wednesday evening by detailing stories of undocumented immigrants who committed violent crimes, telling thousands in the convention centre in downtown Phoenix that he had "met with many of the great parents who lost their children to sanctuary cities and open borders".