More evidence in an Associated Press/Yahoo! poll.

The passion and interest shown by blocs of voters are important because they affect who will be motivated to vote. For now, the numbers favor Obama: 38 percent of his supporters say the election is exciting compared to 9 percent of McCain's. Sixty-five percent of Obama's backers say they are hopeful about the campaign, double McCain's, and the Democrat's supporters are three times likelier to express pride...

Half of McCain's supporters say the race makes them frustrated, more than double Obama's backers who say so. By 2-to-1 or more, McCain backers are likelier than Obama's to say the campaign makes them bored, angry and helpless. And while 16 percent of those preferring Obama say they may change their candidate, 24 percent of McCain's say they might do the same.

"I don't feel I have a choice I can really get behind," said Carol Hall, 63, a Republican from Yorktown, Va., who prefers McCain but said he isn't conservative enough, yet doesn't trust Obama. "I think they're pitiful choices."