Mexico deployed hundreds of riot police on Thursday to intercept a caravan of more than 4,000 Central American migrants, following demands by President Trump that Mexio, Honduras, Guatemala and El Salvador intervene before he has to deploy US troops. “I must, in the strongest of terms, ask Mexico to stop this onslaught – and if unable to do so I will call up the U.S. Military and CLOSE OUR SOUTHERN BORDER!” Trump Tweeted Thursday morning. https://platform.twitter.com/widgets.js On Tuesday, Trump threatened to cut off aid to Guatemala, Honduras and El Salvador if they “allow their citizens, or others, to journey through...