So don’t do it like the last time. Lock them up before their court challenge is resolved. Say that as a co-equal branch of government the courts don’t have jurisdiction to tell you how you do your business and enforcing subpoenas is your business (there’s a supreme court ruling to this effect, the courts should only rule on whether the subpoena was lawfully issued). Have a meeting of the committee that never ends until Bannon testifies.
When someone is actively committing a bank robbery, you don’t say, “Oh well, I guess the police can investigate when it’s over.” If that’s actually the best congress can do then Bannon is right: they are powerless.
I’m confused by this. One is congress conducting it’s own business as a branch of government, the other is the executive branch enforcing a criminal law. They are wholly separate processes.