Race an unknown in U.S. election

Sep 17 - Polls may fail to take into account the issue of race and Barack Obama's historic role as the first African-American to win a major political party's nomination.

According to the Reuters/Zogby poll, Barack Obama now has a statistically insignificant 1-point edge over John McCain among independents -- an indication that America will once again be dealing with a very close election.

Jon Decker reports.

Featured Speaker:Stephen Hess, The Brookings Institution