The Editorial Board writes:  Education Secretary Miguel Cardona recently declared that if the Administration’s new SAVE loan repayment plans weren’t challenged in court, “I’m not pushing hard enough.” Congratulations, sir. Eighteen states have now challenged this back-door loan forgiveness. The Administration rolled out the SAVE plans a mere 10 days after the Supreme Court last summer struck down Mr. Biden’s $430 billion loan forgiveness. As states argue in their lawsuits, the Education Department rushed out the plans with sloppy regulatory analysis and illegally converted loans into de facto grants.