Central America is now the largest source of undocumented migration across the U.S. southern border. The U.S. government has ramped up deportations of Central Americans to deter people from coming. In June, Vice President Mike Pence even traveled to Guatemala to warn Central Americans: "Come to the U.S. legally or don't come at all." And yet they keep coming. A new study by researchers at Vanderbilt University says that’s because the U.S. is in denial about the real reason Central Americans