So much for all the Teabaggers, as well as Sean Hannity, denying that it ever happened.

Someone does not understand congressional immunity:

…shall in all Cases, except Treason, Felony, and Breach of the Peace, be privileged from Arrest during their attendance at the Session of their Respective Houses, and in going to and from the same, and for any Speech or Debate in either House, they shall not be questioned in any other Place.

(emphasis mine)

A congressman in that position could have pulled out a gun and shot the protesters dead,^* and shot them dead, because they are immune from almost all prosecution.

Doubtless any member of the House or Senate who did this would be expelled in short order, but prosecution would be complex, to say the least.

^*Take my legal advice with a grain of salt, I’m an engineer, not a lawyer, dammit!^†
†I LOVE IT when I get to go all Doctor McCoy!!!