by Rebecca Beitsch and Rafael Bernal - 04/08/21 10:00 AM ET✕The Biden administration says it’s making headway on more quickly processing migrant minors in their custody while continuing to expel a record number of adults under Trump-era COVID-19 protocols.March numbers released by the Department of Homeland Security show more than 172,000 migrants were encountered by U.S. authorities at the southern border last month — a 71 percent increase over February figures and the highest total recorded since 2006.The numbers, officially released Thursday, were previously reported as “preliminary...…by Rebecca Beitsch and Rafael Bernal - 04/08/21 10:00 AM ET✕The Biden administration says it’s making headway on more quickly processing migrant minors in their custody while continuing to expel a record number of adults under Trump-era COVID-19 protocols.March numbers released by the Department of Homeland Security show more than 172,000 migrants were encountered by U.S. authorities at the southern border last month — a 71 percent increase over February figures and the highest total recorded since 2006.The numbers, officially released Thursday, were previously reported as “preliminary...WW…