Does a state violate the Due Process Clause when retroactively imposing litigation restrictions on a pro se litigant without specific findings, heightened procedural safeguards, or reasonable evidentiary standards?

1. Does a state violate the Due Process Clause and fundamental common law principles when it retroactively imposes litigation restrictions on a pro se litigant without requiring specific findings tied to statutory definitions, heightened procedural safeguards, or reasonable application of constitutionally required evidentiary standards —or by shifting the burden of proof, restricting meaningful judicial review, or creating a presumption in favor of the opposing party? 1