Caravan migrants arrive in Mexico City, bed down in stadium

U.S.-bound Central American migrants begin their morning trek with a free ride on a truck, as part of a thousands-strong caravan leaving Cordoba, Veracruz state, Mexico, Monday, Nov. 5, 2018. A big group of Central Americans pushed on toward Mexico City from a coastal state Monday, planning to exit a part of the country that has long been treacherous for migrants seeking to get to the United States. (AP Photo/Rodrigo Abd)

MEXICO CITY — Thousands of Central American migrants traveling in a caravan arrived in the Mexican capital Monday and began to fill up a sports stadium, still hundreds of miles from their goal of reaching the U.S. a day before midterm elections in which President Donald Trump has made their journey a central campaign issue.