Trump to make unexpected trip to Mexico after tough rhetoric

By Steve Holland WASHINGTON (Reuters) - Donald Trump will travel to Mexico on Wednesday and meet President Enrique Pena Nieto in an unexpected trip to a country which the Republican presidential candidate has vilified as the main source of illegal immigration and drug smuggling to the United States. Trump's visit to Mexico City takes place hours before he is due to deliver a highly anticipated speech in the border state of Arizona on how he would tackle illegal immigration if he wins the Nov. 8