On the Thursday before Christmas, President Biden called Mexico’s president, Andrés Manuel López Obrador, and asked for help. The number of migrants crossing into the U.S. — about 10,000 per day — had reached the highest level of Biden’s presidency. The surge was creating major problems, including lockdowns at a New Mexico high school where migrants were streaming across the grounds and the closure of a rail bridge over the Rio Grande that carried commercial goods. #news