The Final Four Days: Candidates Jockeying for Position in Iowa

Dec. 30, 2007 — -- Presidential hopefuls are putting in their final pushes before the Iowa caucuses, which are four days away. The last-ditch efforts come at a time when the three Democratic frontrunners are at each others' heels.

Polls have Hillary Clinton at 29 percent, while Barack Obama and John Edwards sit at 26 percent and 25 percent, respectively.

"The younger you are the more likely you are to support Obama," said Democratic strategist Robert Shrum. "The older you are the more likely you are to support Hillary Clinton. And of course, John Edwards is sitting there with very solid support in Iowa. ... I think any one of those three could probably win."

For Clinton, the inevitability of her campaign's candidacy has faded and the former first lady realizes she may not come in first in Iowa.

"This is a great contest. We don't have any heir apparent in the Democratic party," Clinton said in an exclusive interview with ABC News' George Stephanopoulos. "I'm out there fighting for every single caucus-goer. I'm out making my case to everybody that I can reach. I think this is what elections are supposed to be about."

Meanwhile, Edwards and Obama find themselves fighting for the same voters. Edwards even has begun to sound more like his opponent.

"My view is: It's the job of the president of the United States to unify and galvanize the American people, not to divide them," he said.

And on Saturday, Edwards tried to one-up Obama with a pledge.

"When I am president of United States, no corporate lobbyists and no one who has lobbied for a foreign government will be working in my White House," he said.

Obama's campaign has attempted to lure Edwards' supporters, who may be more likely to shift than Clinton's. Obama claims he is the only Democrat who could beat a Republican.

"I'm the only Democrat who does it. John Edwards doesn't do it," Obama said. "Part of the problem John would have in the general election is the issues that he's taking out now are not the issues or the things that he said four years ago."