Millions turned on their televisions to watch the 90-minute showdown while a smaller but highly engaged subset took to social networks to discuss and score the debate as it unspooled in real time. Until recently, debate watchers would have waited through the entire broadcast to hear analysis and reaction from a small cadre of television pundits. Social media has democratized the commentary. It has given a voice to a far wider range of participants who can shape the narrative long before the candidates reach their closing statements.