More and more Venezuelans are left stranded in Mexico, one reason for the decrease in border crossings. This highlights the extent to which the United States depends on its neighbor to the south to control immigration.

Arrests of immigrants for illegally crossing the U.S.-Mexico border have dropped sharply this year after reaching an all-time high in December. Last week, Mexico said it would give about $110 a month for six months to each Venezuelan it deported, in the hope they would not return.