Vigilantism is a crime.  Yet 'citizen's arrests' actually exists and is lawful.  This, to me, is a confusion.  I believe 'citizen's arrest' means you have to be a witness to the crime--you have to physically 'be there' when the crime happens.  You also have to have proof of the crime.  Now here's teh thing.  They are doing it on camera, they are livestreaming, the video is uploaded and you are a witness to it no matter whwere you are So as I read it, anyone with a sufficient small force (like a militia) could arrest her on citizens arrest for violations that are NOT protected under speech or debate.  Keep in mind, they have body guards and I believe they can use deadly force.    It's also a violation to get physical with a congress person or to assault them.  SO basically you'd have to have a small army, you'd have to ambush them, you'd have to film it.  You'd have to use nonlethal weaponry.  You'd have to tell them exactly what violation, and show them proof. You'd have to read them their rights and you'd have to have them ziptie themselves or have their own bodyguards do it. YOu'd probably have to threaten to arrest their bodyguards for obstruction of justice.  YOu'd have to be clear it was a citizens arrest and that you have the authority to do it, and you'd have to cite the law that enables you to lawfully do it.  It would be helpful if you had friends in law enforcement that will back up your play disclaimer: the above is legal fantasy fiction and is not to be taken as advocating for lawbreaking or violence of any kind or any other manner of opposition to the legal and sovereign authority of the US.  opiions above do not represent voat, its advertisers, or covert backchannel affiliates