Ignoring the specific charges he got, I would think that he should not constitutionally be able to hold office at all. His direct aid to the Browns in their standoff in my mind should fall under section 3 of the 14th amendment, which prohibits anyone who attempts to rebel against the federal government, or provides aid to rebels, from federal or state legislatures. He didn’t built bombs because he was getting monetary kickbacks, he did it for batshit ideological reasons, the Browns by their own words thought they were leading a militia movement against a corrupt government, so I would think that it would apply in theory.

Practically, not sure that this should apply to a conviction of aiding tax fraud.