When former President Donald Trump filed a request for the Supreme Court to stay the D.C. Circuit’s ruling against his immunity claim from the federal election conspiracy case, he suggested that even the Supreme Court itself should wait if they can get the D.C. Circuit to rehear the case en banc, or by the entirety of the judicial body on the circuit. But Trump should be astonished if he gets the appellate court to do that, former federal judge Nancy Gertner told CNN’s Anderson Cooper on Monday. “Judge, what would be the likelihood that the full D.C. appeals court would overrule that three-jud…