This is Zen Master’s take. Either 6-3 for Trump or 7-2.
It should be obvious that if a President doesn’t have immunity, then ANY state prosecutor ANYWHERE could concoct a “case” and indict any and all previous CinC’s. W would face war crimes trials, Zero would be indicted for murdering a U.S. citizen and Rutabaga would be charged with conspiracy to overturn the government via the illegal invasion.