Barack Obama and Republican challenger Mitt Romney are preparing themselves for one of the tightest US presidential races in years, as attention turns to swing states including Ohio and Florida ahead of polling later today.
The American public will vote in what analysts are predicting could be the closest race yet to the White House, with the two candidates neck-and-neck in the latest polls.
Mr Obama is holding a slender lead in crucial swing states, as more than 100million Americans prepare to cast their vote later this evening and over 30million votes already lodged so far.
With that in mind, attention is set to turn to the battlegrounds in the race for the presidency – traditionally marginal states such as Ohio, Wisconsin and Iowa in the Midwest and Florida, Virginia and North Carolina on the eastern seaboard.
Late last night, both men made last-ditch pleas for votes with empassioned speeches promising to make a real difference to the lives of everyday Americans.
In his closing remarks at a last-minute rally in Ohio, Mr Romney promised the American public ‘real change’ if he was elected.
‘The election comes to this, do you want four more years like the last four years? Or do you want real change?’ he said.
‘Now president Obama promised change but couldn’t deliver it. Now I not only promise change but I have a record of achieving.
‘If you are tired of being tired then I ask you to vote for real change and to make that happen tomorrow.’
He added: ‘With the right leadership, America is going to come roaring back.
‘The only thing that stands between us and some of the best years that we could ever imagine is lack of leadership and that is why we have elections.
‘Tomorrow is a moment to look into the future and imagine what we can do.’
Meanwhile on his final day of campaigning in Iowa, Obama urged the thousands of people in front of him not to ‘give up on change’.
‘We’ve come too far to turn back now,’ the president said earlier in Ohio.
‘We’ve come too far to let our hearts grow faint… We’ll finish what we started.
‘We’ll renew those ties that bind us together and reaffirm the spirit that makes the United States of America the greatest nation on Earth.’
Mr Obama enlisted an A-list army of celebrities for his last day of campaigning including former president Bill Clinton, rapper Jay Z and musician Bruce Springsteen to carry his message.
Meanwhile Mr Romney has the backing of entrepreneur Donald Trump, media mogul Rupert Murdoch and former Californian governor Arnold Schwarzenegger.
The latest NBC News/Wall Street Journal poll shows Mr Obama has the support of 48 per cent of voters while Mr Romney has a 47 per cent share.
Both candidates have spent more than £1.2billion on their campaigns which started more than two years ago.