When Solicitor Basic Elizabeth Prelogar appeared earlier than the Supreme Courtroom final week to defend the Biden administration’s bold plan to waive federal pupil mortgage debt, she had some explaining to do. The coverage she’s defending belongs to Mr. Biden. However the system of governance it depends on is a product of the George W. Bush administration, a type of emergency rule meant to handle the post-Sept. 11 world. Abused in its day, it has, alas, been discovered helpful by each administration…