There is no statue which covers what he did as a crime. What he did was to support, condone, encourage statements which had no basis in factual validity. Had he reviewed all the real evidence (recounts & audits, and court cases) he would have concluded, had he been objective and honest, with just a smidgen of integrity, he would have told all those Trump supporters he had found no evidence to support their belief the election was stolen. Because he did not, he is part and parcel of their delusion and actually promoted the march to the Capitol.
That is his "crime".