A new study fielded by Digitas shows the importance of a strong social-media strategy for this cycle's presidential hopefuls. Social media was certainly a contributor to President Obama's success in 2008, and with its growth in popularity since then comes a growth in impact. This graphic puts some numbers to the trend.
Perhaps the surprising thing, then, is the stat that 40% of social-media users don't expect candidates to have a social-media presence. In this day and age, not having a social-media presence would seem as backwards as, [insert your own politically flavored joke in the comments].