CIUDAD HIDALGO, MEXICO – OCTOBER 21: A migrant caravan walks into the interior of Mexico from the Guatemalan border on October 21, 2018 near Ciudad Hidalgo, Mexico The caravan of thousands of Central Americans plans to eventually reach the United States. U.S. President Donald Trump has threatened to cancel the recent trade deal with Mexico and withhold aid to Central American countries if the caravan isn’t stopped before reaching the U.S. (Photo by John Moore/Getty Images)