WATCH: Steve Kornacki Reacts to Nailing His Kentucky Derby Prediction at Odds of 12-1

Steve Kornacki was a late addition to NBC's coverage of the Kentucky Derby, but the MSNBC political analyst and polling specialist dubbed a "chart-throb" is proving to be a valuable sports asset. Before the race, 12 NBC correspondents gave their predictions for who would win, and Kornacki was the only...