On the day we celebrate moms in this country, there are thousands of mothers, and children, living like this on both sides of America's southern border: Venezuelan immigrant Stephanie holds her 10-month-old daughter, Hannie, after spending the night camped alongside the U.S.-Mexico border fence, December 22, 2022, in El Paso, Texas. They had traveled to the U.S. border from Chile, where Hannie was born. John Moore/Getty Images The COVID-era law that effectively allowed both the Trump and Biden administrations to expel migrants back into Mexico before they could ask for asylum is no more; it expired. In its place, the...