>> we have a gun violence problem. so i'm voting for hillary clinton. she's tough. she will stand up to the gun lobby. >> reporter: joe johns, cnn, phoenix, arizona. >> thank you, joe. on top of the tv ads, hillary clinton with a cameo on a sitcom last night.

shooting victim gabby giffords. >> we have a gun violence problem. so i'm voting for hillary clinton. she's tough. she will stand up to the gun lobby. >> reporter: joe johns, cnn, phoenix, arizona. >> hillary clinton built on her super tuesday wins with a cameo on a sitcom last night. "broad city." the show is popular with young