Pence is not a stupid man.
He knows.
He is in on it.
Pence was a trojan horse. He was not selected except in the sense of the least of the evil minders Trump was allowed to choose from.
But you don't have to be stupid to be blind (as you and I know from the UFO threads). Pence is a very conventional man and the country is in a very unconventional predicament right now.
It is hard for conventional people to see things outside their frames of reference. More a matter of being afraid and closed-minded than being stupid.
They must have something devastating on Pence for him to carry on this way.