mexico city u.s. republican presidential front-runner donald trump political rhetoric racist evocative adolf hitler former mexican president felipe calderon tell reporters event mexico city saturday logic praise white supremacy anti-immigration calderon say act speak immigrants different skin color frankly racist exploit feel like hitler time calderon say trump accuse mexico send rapists drug runners across u.s. border say make mexicans pay wall border felipe calderon president mexico 2006-12. former mexican president vicente fox calderon predecessor also compare trump hitler interview anderson cooper cnn remind hitler fox tell cooper friday report joanna zuckerman bernstein luis rojas edit crosse article fund part sap independently create reuters editorial staff sap editorial involvement creation production two former presidents mexico compare trump hitler