Jail them for contempt!
Heck boss, let’s take it easy here. If they start jailing people who are in contempt of Congress, all of us qualify!
Who are the enforcers is the problem. Congress does NOT have there own police force. This is held by the Executive Branch of our gov’t. God’s knows we have a corrupted Executive Branch. Even the Judiciary Branch has no authority to punish. Our ONLY punishment is Impeachment and withholding funds that we have at this point.