Here is a primer discussing Congressional inquiry, subpoena, and enforcement powers.
Fine.
Then, why haven't they done it since 1934? That's either party.
As I have pointed out -- on several occasions -- I'm not arguing with your premise that Congress has the authority to arrest and detain contemnors.
Instead, I am questioning whether they any longer have the ability to that, much less the will!
You have yet to address this question. Or even recognize it...