Guests: Jason Kander, Harry Litman, Michelle Goldberg, Rep. Grace Meng

A Super Bowl celebration ends in mass gun violence. Tonight: What we know about what happened in Kansas City. Then: Jack Smith asks the Supreme Court to hurry up. Tonight's filing from the special counsel to try and end Trump delay tactics. And as George Santos taunts the MAGA Congress that ejected him, new signs Republicans aren't learning lessons from their losing ways.