Report Card: Is John McCain Running Out of Time?

Oct. 31, 2008— -- As he veered through four different campaign stops in Ohio, Sen. John McCain, the war hero, longtime lawmaker and Republican presidential nominee, was mindful of the final, elusive hurdle he has yet to conquer -- winning the presidency.

While on the stump in Ohio today, McCain, R-Ariz., reiterated his message.

"There's just four days left," he told a crowd in Hanoverton, Ohio. "The pundits have written us off as they have before. But we're closing."

Click HERE for more analysis from George Stephanopoulos.

McCain knows he's behind in the polls, and he knows his time is running out. Today's ABC News tracking poll shows Democratic nominee Sen. Barack Obama's advantage over McCain has opened up slightly, rising a percentage point to a 9 percent lead.

But McCain, who told ABC News that he is closing that gap and will win on Tuesday, continues to slog it out one voter at a time.

Even with the election just days away, there still are voters unsure of who they will cast their ballots for. While the amount of undecided voters is unclear, both sides are actively trying to sway this key group.

"The McCain campaign believes that universe of undecided voters could be as high as 10 percent," ABC News' chief Washington correspondent George Stephanopoulos said, "and that they are disproportionately white, women, elderly Bush voters who could break towards McCain."

Team Obama thinks otherwise.

"The Obama campaign believes it's a smaller universe and that they're split ... evenly between those who lean towards Obama and towards McCain," said Stephanopoulos. "Our own polling shows that only about 2 percent of the country is truly undecided," Stephanopoulos added. "Those people are highly unlikely to vote. A bigger universe of 5 to 7 percent of the country who might go either way, we see them leaning a little bit more towards McCain, but not by as much as his team says."