A poll of likely voters across the nation shows Barack Obama with a slight edge over John McCain in the presidential race.
The USA Today-Gallup Poll finds support for Obama at 50 percent, to McCain's 44 percent.
Obama's slight advantage is basically unchanged since Hillary Rodham Clinton ended her campaign earlier this month.
While six in 10 likely Democratic voters polled say they're more enthusiastic than usual about the election, only about a third of Republicans feel as energized.
Seven in 10 worry that McCain's policies would be too similar to President Bush's, while half are concerned Obama's changes would go too far.
Almost one in 10 say Obama would be a less effective president because he is black, while one in four say the 71-year-old McCain would be less effective because of his age.
The poll has a margin of sampling error of plus or minus 3 percentage points.