On January 2, Donald Trump’s legal team filed his last official salvo with the Court of Appeals for the D.C. Circuit, continuing to argue that he is entitled to presidential immunity for plotting to overturn the 2020 election. His ploy for criminal immunity, if not for the seriousness of the matter, would be laughable for its legal flaccidity. It also appears to run afoul of federal pleading rules, which on appeal are read in conjunction with appellate rules. Trial attorneys who sign pleadings affirm that, after reasonable inquiry under the circumstances, their pleadings are truthful and have …