As you said no crime is necessary but 'obstruction of congress' by abiding by the Separation Powers and deferring to the courts to rule on the dispute isn't even a pretence at a crime.
Third party hearsay, also no crime.
If Schiff had fronted up at the Aussie CDPP with such an abysmal prosecution case he'd have left very quickly with the imprint of a shapely black heel on his ass.
President Trump hasn't done anything wrong, the shampeachment was a disgrace and the Senate should boot it immediately.
Shall we leave it there? I sense neither one of us will persuade the other.