That is either BS from Johnson or, more likely, he doesn't know what he is talking about.
Read:
Inherent contempt
Under this process, the procedure for holding a person in contempt involves only the chamber concerned. Following a contempt citation, the person cited is arrested by the Sergeant-at-Arms for the House or Senate, brought to the floor of the chamber, held to answer charges by the presiding officer, and then subjected to punishment as the chamber may dictate (usually imprisonment for punishment reasons, imprisonment for coercive effect, or release from the contempt citation).
I’m not positive it was him on tucker-
whoever it was was sounding like he was basically throwing in the towel- still gonna go ahead with the subpoenas, but then only say “Oh well folks, we tried, but they refused to give us the answers we sought, and now we’re powerless to do anything about it- but don’t hate us for it- We certainly tried out best’