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.

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President Barack Obama shakes hands at a campaign event in the State Capitol Square

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."


Andrew Kaczynski
Polls close in Ohio in 2565 minutes.

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.

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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.

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Republican presidential candidate and former Massachusetts Gov. Mitt Romney greets supporters during a campaign rally at the International Exhibition Center in Cleveland

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."

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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.

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  • 2012 -- Barack Obama

    U.S. President Barack Obama waves to supporters following his victory speech on election night in Chicago, Illinois on November 6, 2012. (JEWEL SAMAD/AFP/Getty Images)

  • 2008 -- Barack Obama

    Nov. 4, 2008: U.S. president-elect Barack Obama waves at his supporters during his election night victory rally at Grant Park in Chicago. (JEWEL SAMAD/AFP/Getty Images)

  • 2004 -- George W. Bush

    In this Nov. 3, 2004 file photo, President George W. Bush and first lady Laura Bush salute and wave during an election victory rally at the Ronald Reagan Building and International Trade Center in Washington. (AP Photo/Charles Dharapak, File)

  • 2000 -- George W. Bush

    U.S. Republican presidential candidate and Texas Governor George W. Bush casts his vote in Austin, Texas on November 7, 2000. (PAUL RICHARDS/AFP/Getty Images)

  • 1996 -- Bill Clinton

    President Bill Clinton, wife Hillary and daughter Chelsea wave to supporters in front of the Old State House during an election night celebration in Little Rock, Ark. on Tuesday, Nov. 5, 1996. (AP Photo/David Longstreath)

  • 1992 -- Bill Clinton

    Bill Clinton and Al Gore celebrate in Little Rock, Arkansas after winning in a landslide election on November 3, 1992. (AP Photo)

  • 1988 -- George H. W. Bush

    President-elect George Bush and his family celebrate his victory on November 8,1988 at the Brown Convention Center in Houston. (WALT FRERCK/AFP/Getty Images) <em><strong>CORRECTION:</strong> An earlier version of this slide was titled "George W. Bush." It has been fixed.</em>

  • 1984 -- Ronald Reagan

    President Ronald Reagan gives a thumbs-up to supporters at the Century Plaza Hotel in Los Angeles as he celebrates his re-election, Nov. 6, 1984, with first lady Nancy Reagan at his side. (AP Photo/File)

  • 1980 -- Ronald Reagan

    President-elect Ronald Reagan and wife Nancy wave to well-wishers on Tuesday, Nov. 4, 1980 at Century Plaza Hotel in Los Angeles after his election victory. (AP Photo)

  • 1976 -- Jimmy Carter

    Democratic presidential candidate Jimmy Carter embraces his wife Rosalynn after receiving the final news of his victory in the national general election on November 2, 1976. (Photo by Hulton Archive/Getty Images)

  • 1972 -- Richard Nixon

    U.S. President Richard M. Nixon meets at Camp David, Maryland, on November 13, 1972 to discuss the Vietnam situation with Secretary of State Henry A. Kissinger (L) and Maj. Gen. Alexander M. Haig Jr.(R), Deputy Assistant to the President for National Security Affairs. (Photo by AFP PHOTO/NATIONAL ARCHIVE/Getty Images)

  • 1968 -- Richard Nixon

    President-elect Richard M. Nixon and his wife, Pat, were a picture of joy at the Waldorf-Astoria Hotel in New York, Nov. 6, 1968, as he thanked campaign workers. At left are David Eisenhower, Julie Nixon's fiance, Julie and her sister Tricia at center. (AP Photo)

  • 1964 -- Lyndon Johnson

    President Lyndon Johnson proves he's a pretty good cowhand as he puts his horse, Lady B, through the paces of rounding up a Hereford yearling on his LBJ Ranch near Stonewall, Texas, on November 4, 1964. (AP Photo/Bill Hudson)

  • 1960 -- John F. Kennedy

    Caroline Kennedy peeps over the shoulder of her father, Senator John F. Kennedy, as he gave her a piggy-back ride November 9, 1960 at the Kennedy residence in Hyannis Port, Mass. It was the first chance president-elect Kennedy had to relax with his daughter in weeks. (AP Photo)

  • 1956 -- Dwight D. Eisenhower

    President Dwight D. Eisenhower and Vice President Richard Nixon salute cheering workers and Republicans at GOP election headquarters in Washington, November 7, 1956, after Adlai Stevenson conceded. (AP Photo)

  • 1952 -- Dwight D. Eisenhower

    President-elect Dwight Eisenhower and first lady-elect Mamie Eisenhower wave to the cheering, singing crowd in the Grand Ballroom of the Hotel Commodore in New York City on Nov. 5, 1952 after Gov. Adlai Stevenson conceded defeat. (AP Photo/Matty Zimmerman)

  • 1948 -- Harry S. Truman

    U.S. President Harry S. Truman holds up an Election Day edition of the Chicago Daily Tribune, which, based on early results, mistakenly announced "Dewey Defeats Truman" on November 4, 1948. The president told well-wishers at St. Louis' Union Station, "That is one for the books!" (AP Photo/Byron Rollins)

  • 1944 -- Franklin D. Roosevelt

    President Franklin Roosevelt greets a young admirer as he sits outside his home in Hyde Park, N.Y., on election night, November 7, 1944. Behind him stands his daughter, Mrs. Anna Roosevelt Boettinger and the first lady, Eleanor Roosevelt. (AP Photo)

  • 1940 -- Franklin D. Roosevelt

    American President Franklin Delano Roosevelt (1882 - 1945) speaking to a crowd of 25,000 at Madison Square Garden in New York on Nov. 8, 1940, before his sweeping re-election for a third term. (Photo by Fox Photos/Getty Images)

  • 1936 -- Franklin D. Roosevelt

    The Republican Governor of Kansas and presidential candidate, Alfred Landon (1887 - 1987) greeting the American President Franklin Delano Roosevelt (1882 - 1945) (seated) prior to the presidential elections. Future United States President Harry S. Truman can been seen in the background. (Photo by Keystone/Getty Images)

  • 1932 -- Franklin D. Roosevelt

    Governor Franklin D. Roosevelt of New York at his Hyde Park, N.Y. home November 6, 1932, seen at the conclusion of the arduous months of campaigning following his presidential nomination in Chicago. (AP Photo)

  • 1928 -- Herbert Hoover

    President-elect Herbert Hoover is seated at a table with wife, Lou, and joined by other family members on Nov. 9, 1928. Standing from left: Allan Hoover; son; Margaret Hoover, with husband, Herbert Hoover, Jr.,at right. Peggy Ann Hoover, daughter of Herbert Hoover Jr., sits with her grandmother. (AP Photo)

  • 1924 -- Calvin Coolidge

    U.S. President Calvin Coolidge and first lady Grace Coolidge are shown with their dog at the White House portico in Washington, D.C., on Nov. 5, 1924. (AP Photo)

  • 1920 -- Warren Harding

    Senator Warren Harding, with wife Florence and his father George, shown on Aug. 27, 1920. (AP Photo)

  • 1916 -- Woodrow Wilson

    Surrounded by crowds, President Woodrow Wilson throws out the first ball at a baseball game in Washington in this 1916 photo. (AP Photo)

  • 1912 -- Woodrow Wilson

    Woodrow Wilson (1856 - 1924), the future American president, casts his vote while Governor of New Jersey, on Nov. 14, 1912. (Photo by Topical Press Agency/Getty Images)