US President Barack Obama and Republican candidate Mitt Romney are rushing through several election-decisive states, holding rallies in the few final hours before Election Day.

In an effort to convince the last undecided voters to go out and cast their ballot, Obama and Romney are visiting a total of seven states, while their wives and vice presidential candidates are also rallying in other parts of the country.

Bruce Springsteen sang for the President in Wisconsin and will join the President on the Air Force One, to move to Iowa and then finally reach Ohio, where Obama is to hold the last rally.

Romney started his final campaign day in Florida and is then to move to Virginia, New Hampshire and Ohio.

Both campaigns end in the state that analysts believe will be the election-winner.

Polls give Obama narrowly ahead. Cost of the presidential campaign are estimated to have broken the $2bn barrier.

President Barack Obama looks at the crowd at a campaign event in Madison, WisconsinReuters
US President Barack Obama greets supporters in MadisonReuters
US President Barack Obama is introduced by singer Bruce Springsteen before he speaks at an event in MadisonReuters
Republican presidential nominee Romney speaks at a campaign rally at the airport in Sanford, FloridaReuters
US Vice President Joe Biden speaks during a campaign rally in Sterling, VirginiaReuters
Republican vice presidential candidate Ryan, wife Janna, daughter Liza and sons Charlie and Sam attend campaign event in Reno, NevadaReuters
Republican presidential nominee Mitt Romney greets audience members at a campaign rally at the airport in Lynchburg, VirginiaReuters
Republican presidential nominee and former Massachusetts Governor Mitt Romney attends a campaign rally in Lynchburg, VirginiaReuters
Former U.S. President Bill Clinton introduces U.S. President Barack Obama during a campaign rally in Bristow, VirginiaReuters
US President Barack Obama speaks under two counter assault team members with binoculars on a nearby roof at an election campaign rally yesterday in Concord, New HampshireReuters