President Joe Biden’s border chief is making a second effort to cancel the “Remain in Mexico” (RIM) program because it hinders migrants’ ability to ask judges to let them stay in the United States. The United States is a “nation of immigrants,” border chief Alejandro Mayorkas claimed in a 39-page report that was prepared for a federal judge who directed in August that the program be kept going. Mayorkas, who is the secretary at the Department of Homeland Security, ignored the benefits to Americans of the program even as he described the risks and harms to migrants. Mayorkas also ignored...