Migrant caravan gathers on Guatemala border to enter Mexico en masse

Hundreds of Central Americans gathered on the Guatemala-Mexico border on Sunday, aiming to cross en masse early on Monday in what could prove a stiff test of the Mexican government's pledge to satisfy U.S. demands to curb migrant flows.President Donald Trump has threatened to hurt Mexico and Central American countries economically if they allow large numbers to reach the U.S. border.Small groups of migrants crossed the bridge from Tecun Uman, Guatemala, to Ciudad Hidalgo, Mexico, on Saturday aft