Chris Cilliza argues there were 5 myths about the 2008 election. However, on #2, I'm not sure the data necessarily supports his conclusion...
2. A wave of black voters and young people was the key to Obama's victory.
Afraid not. ... Exit polling suggests that there was no statistically significant increase in voting among either group. Black voters made up 11 percent of the electorate in 2004 and 13 percent in 2008, while young voters comprised 17 percent of all voters in 2004 and 18 percent four years later.
The surge in young and African American voters is not entirely the stuff of myth, however. Although their percentages as a portion of the electorate didn't increase measurably, Obama did seven points better among black voters than Sen. John F. Kerry did in 2004 and scored a 13-point improvement over Kerry's total among young voters.
The flat total turnout, but higher margin of victory among young voters could tell us one of two things.
- The wave was a myth: The youth vote was the same, but they swung to Obama. The composition changed by persuasion.
- The wave was a reality: The youth vote likely to vote for McCain stayed home, while a wave of new young voters turned out for Obama. The composition changed by differences in enthusiasm, ground game and coalition expansion.
If #2 is correct, it implies these Obama voters are not persuadable swing voters, but a new generation of likely Democratic voters. That will be a far harder barrier for Republicans to overcome in the long term.