They didn’t follow the rules when they set up that committee.
That's the thing about the House and Senate rules.
The Constitutions gives each chamber the power to make their own rules. However, breaking those rules are not prosecutorial crimes.
I fear that the only recourse within Congress is to refer the members of the J6 Committee to their respective Ethics Committee, and then for those committees to recommend expulsion. Censure will mean nothing.
We know that no chamber will expel a Democrat member when the margin of power is razor-thin. Expulsion is only for Republicans these days.
-PJ