If they didn’t do any crimes, they’ll have no problem testifying. If they want to obstruct investigation and interfere in govt investigations, charge accordingly.
Pence knew what was going to happen. He was silent about it. His staff was silent. They let it happen. They covered for Trump even as it put Pence in mortal peril.
These people are irredeemably awful and should never be allowed near a position of power again. Ever.