So they are afraid of his running again? Another foul misuse of impeachment. If nothing else, Trump has shown himself to have committed no acts or crimes which deserve impeachment or persecution, so that is why they have tried to gaslight the World about this silly “insurrection” in the Capitol.
I think they have private polling which shows how much people believe the election was stolen, and they did not expect that belief across the country to persist. They goofed.