I did listen to the entire speech and Warren did violate Senate decorum. Rule 19 dates back a long way, after a Senator insulted another in session and the insulted Senator took a cane to him. Since then, Senators are not allowed to attack the character of a colleague while in session. Warren thought she could get around that by reading a letter from Coretta Scott King that attacked Sessions. Her argument is "Well, it's not me doing it, but a civil rights icon." McConnell was right to shut her down. She was trying to get around the rules and he treated her like the snot-nosed brat she was acting like.