Peabody-winning comedian John Mulaney says he's a huge Supreme Court arguments nerd, and explains why he was in the gallery to watch recent proceedings in the nation's highest court. Stick around for more with John Mulaney and find tickets to his "Mister Whatever" standup comedy tour at https://www.johnmulaney.com. #Colbert #Comedy #JohnMulaney #MisterWhatever #StandUpComedy #ComedyTour #StephenColbert #TheLateShow Subscribe To "The Late Show" Channel: http://bit.ly/ColbertYouTube Watch full