AP poll shows Obama backers gleeful, McCain's glum

WASHINGTON (AP) -- That smiling guy walking down the street? Odds are he's a Barack Obama backer. The grouchy looking one? Don't ask, and don't necessarily count on him to vote on Tuesday, either.

More John McCain supporters feel glum about the presidential campaign while more of Obama's are charged up over it, according to an Associated Press-Yahoo! News poll released Saturday.

The survey shows McCain backers have become increasingly upset in recent weeks, a period that has seen Obama take a firm lead in many polls. One expert says the contrasting moods could affect how likely the two candidates' supporters are to vote on Election Day, possibly dampening McCain's turnout while boosting Obama's.

While 43 percent of the Democrat Obama's backers said they are excited over the campaign, just 13 percent of McCain's said so, according to the survey of adults, conducted by Knowledge Networks. Six in 10 Obama supporters said the race interests them, compared to four in 10 backing McCain, the Republican senator from Arizona.

(More here.)