Already, we are being inundated with stories about the how social media will shape the 2012 campaigns (and how Facebook may, or may not, transform the Presidency itself).  Two facts, however, limit the potential role social media will, ultimately, play in the 2012 election:

1.) Young people are heavy users of social media, but are unlikely to vote.

2.) Older folks are likely to vote, but are much less involved in social media.

Thus, the reality is that social media is best at reaching those least likely votes. In its 2008 post-election analysis, Pew found that while 72% of Americans 18-29 year of age were using the Internet for political activities or information gathering (and 49% used social-networking sites for these purposes), only 22% of Americans 65+ years of age engaged in such activities on the Internet (and a mere 2% did so on social media).

From: Aaron Smith, "The Internet's Role in Campaign 2008," Pew Internet & American Life Project, 15 April 2009

At the same time, young adults are roughly 33% less likely to vote than their grandparents. (Note: I had to hunt down a different source of data, so the age groupings vary slightly compared to the previous table.)

Table compiled by PJ Rey using data from the US Census Bureau.

While the influence of social media may be somewhat over-hyped, social media should not be ignored.  This age-based line of analysis does, in fact, indicate that social media is likely to play a more significant role in 2012 than it did 2008, because, though a majority of Americans 56 years and older are still not on social media, the number of users in age group has tripled in just a few short years.

From: Kathryn Zickuhr, "Generations 2010," Pew Internet & American Life Project, 16 December 2010

The inverse proportionate relationship between social media use and voting will likely attenuate the impact of organization and communication through Twitter, Facebook, and other such platforms in the coming election; nevertheless, social media is on course to continue playing a larger role in most aspects of our lives, including electoral politics.