Jack talks about being JFK's grandson, meeting Nancy Pelosi at the DNC, speaking at the convention, getting young people involved in the vote, supporting Kamala Harris, his cousin RFK Jr., making a TikTok video with Doug Emhoff and David Letterman, playing the game Condiment or Sauce, and putting mayo on pizza. Watch 'Jimmy Kimmel Live!' WEEKNIGHTS 11:35/10:35c on ABC. Stream on Hulu.