How a Climate Change-Fueled Drought & U.S.-Fed Violence Are Driving Thousands from Central America

President Trump is urging Mexico to deport the thousands of Central American migrants who are at or approaching the U.S. border in an attempt to seek asylum, days after U.S. border authorities fired tear gas into a crowd of asylum seekers as some tried to push their way through the heavily militarized border near San Diego. Trump tweeted, "Mexico should move the flag waving Migrants, many of whom are stone cold criminals, back to their countries. Do it by plane, do it by bus, do it anyway you want, but they are NOT coming into the U.S.A. We will close the Border permanently if need be. Congress, fund the WALL!" This comes just days before Andri(C)s Manuel Lopez Obrador is sworn in as Mexico's new president. Lopez Obrador's incoming government has denied it made any deal with the Trump administration to force asylum seekers to remain in Mexico while their U.S. asylum claims are processed. We speak with John Carlos Frey, Emmy Award-winning investigative reporter and PBS NewsHour special correspondent. He recently returned from reporting trips in Guatemala, Mexico City and Tijuana, where he was documenting the migrant caravan.