There is a simple reason why Barack Obama wins the you vote. It’s more diverse than older cohorts:
Perhaps because Obama’s strength among young voters was first evident in Iowa, an extremely white state, discussions of race and age are generally held separately. Obama certainly did better among young whites than their parents and grandparents (54% among young whites v. 41% among all other whites), but much of Obama’s exceptional performance among young voters was due to the larger share of non-white voters. Indeed, even if Obama did as poorly among young whites as he did among whites over 30, Obama still would have won 58% of the youth vote. So long as non-white voters continue to offer overwhelming support for Democrats, the youth vote can be expected to offer overwhelming support for Democrats, as well.