We all (or most of us) know that Trump is bad but Pence is worse. He would enforce teaching creationism and force everyone to pray.
He would try to turn the country into a Theocracy. If Trump is impeached, Pence needs to go as well...but again, that is why the midterm elections are so important. He wouldn't be able to implement many of his primitive ideas if his hands were tied by the opposing party.