President Barack Obama is the favourite by a knife edge as the clock ticks closer to decision time for Americans - but in many crucial states the Democrat is still tied with his Republican challenger Mitt Romney.
The president has jetted between Ohio, Wisconsin, Iowa, Virginia, New Hampshire, Florida and Colorado, racing across the nation to make his case to anyone, anyone at all, who hasn't quite decided who they'll be backing.
Romney has been on his tail in all the major swing states. Both know where they need to be to get the votes that will count.
"I know we can make it happen, we're so very, very close," Romney told voters in Newport News, Va.,
In a rally in Des Moines, Iowa, the Republican leader told a rally: "The only thing that stands between us and some of the best years we can imagine is a lack of leadership - and that's why we have elections."
Romney will visit Florida, Virginia, New Hampshire and Ohio on Monday. Republican aides insisted Romney will win important swing state Pennsylvania on Sunday.
The Republican leader told a rally in Morrisville: "The people of America understand we're taking back the White House because we're going to win Pennsylvania," reported the BBC.
But Obama still seems to have the upper hand. On the final day of campaigning the president is due to appear in Madison and Wisconsin, with an endorsement from Bruce Springsteen. He will then target key states Iowa and Ohio.
And it's been good enough for bookmaker Paddy Power, who has paid out those who bet on the President to win.
Obama edges Romney 48 percent to 47 percent nationally, well within the 2.55 percent margin of error, in a new NBC News/Wall Street Journal poll released Sunday.
Key is that Obama is holding a tiny lead in one of the most important of those swing states - Ohio. There, the president leads by 50 per cent to 48 per cent, according to the Columbus Dispatch.
The Chillicothe Gazette, Ohio’s oldest newspaper, endorsed President Barack Obama on Sunday, a shift in support from the endorsement they offered Sen. John McCain in the 2008 presidential election.
Praising Obama's "leadership, strength and future vision" they say Romney’s evolving position on abortion and healthcare has left them with "misgivings." Additionally the editorial attacks his job proposals, writing:
"His plan to “create 12 million new jobs” leaves out many specifics, and his bluster on foreign policy issues could pull us into further conflicts that would deplete our military resources."
A Reuters/Ipsos poll had Obama at 48 percent and Romney at 44 percent in the swing state.
Another crucial state is New Hampshire, where the two candidates appear to be tied at 47 per cent each - showing Romney could be gaining an edge, as the last poll conducted by WMUR showed Obama with a tiny lead.
But Huffington Post's Pollster put the President ahead on 49.3 per cent to Romney's 46.6 per cent.
The race in Florida is incredibly tight, with HuffPost/Pollster estimating an exact tie early Saturday, with each candidate attracting just over 48 percent of likely voters.
Florida's Democrats have asked a federal judge to order an immediate extension of early voting hours, citing "unprecedented voter turnout,"according to CNN.
Both vice-presidential candidates, Joe Biden and Paul Ryan, and former Democrat president Bill Clinton have all been hitting the campaign trial hard - even though many have already cast their votes, through early voting systems.
All four of the major players, the presidential and vice presidential candidates, were in Ohio on Sunday.
HuffPost reported that Vice President Biden told voters in Lakewood, Ohio, that Romney differed fundamentally from Obama because the president "says what he means and means what he says, and he does what he says he's going to do. And that cannot be said of Gov. Romney.
He accused Romney of being prepared to "say anything to win".
Ryan was also in Ohio, where he told voters how Washington had changed in the Obama years: "It's the most partisan atmosphere, the most divisive climate in Washington I've ever seen."
In Cleveland Ohio, Romney said undecided votes should "put aside the speeches and look at the record."
Elsewhere, the Obama campaign drew 14,000 people to an outdoor rally in Concord, New Hampshire, the biggest crowd for a campaign event in state's history, the Obama campaign said.