Here's how Americans voted in the 2008 presidential elections by age group (from CNN):
Note the overwhelming (66%) majority of votes for Obama in the generally more liberal 8-29 group, which more than offset the more conservative 65+ age group that preferred McCain.
The great thing about targeting younger voters is, of course, that they will be around for a longer time. If the Democrats can expand this base across Gen-Y, it will be a game changer in American politics as that generation replaces the baby boomers in the years to come.
