Sansa Stark is the most skilled leader on "Game of Thrones" — here's why

Cersei Lannister, Jon Snow and Daenerys Targaryen get a lot of attention as leaders on the HBO show "Game of Thrones." But Bruce Craven, Columbia Business School professor and author of "Win or Die: Leadership Secrets from Game of Thrones," tells CNBC Make It that the character with the best leadership qualities is none other than Sansa Stark.