Obama and Romney 2012 

Ready: Mitt Romney and Paul Ryan gesture to supporters and campaign workers in Richmond Heights, Ohio on Tuesday afternoon

Last efforts: Romney and Ryan grip workers' hands as they make an unscheduled stop at a Wendy's restaurant in Richmond Heights, Ohio

Not your usual cuisine? Romney and Ryan look at the menu while ordering at the Wendy's restaurant

'Running on fumes': Romney visits a campaign call center in Green Tree, Pennsylvania

Ready: Republican presidential candidate, former Massachusetts Gov. Mitt Romney prepares to cast his ballot at Beech Street Center in Belmont, Massachusetts

Stepping up: Mitt Romney, with his wife Ann at his side, casts his ballot for the U.S. presidential election in Belmont, Massachusetts on Tuesday

Job done: Romney and his wife Ann emerge from the Beech Street Center after casting their ballots on Tuesday morning

On to the next stop! Romney boards his campaign plane in Bedford, Massachusetts for Ohio after voting on Tuesday morning

Staying positive: President Barack Obama calls volunteers in Wisconsin as he visits a campaign office in Chicago, Illinois, on election day

All smiles: President Obama speaks to the media and reveals he is 'confident' that he has enough votes to win the election

Thankful: The president hugs a volunteer during his visit to a campaign field office in Chicago, near to his South Side home

Support: Obama looks at a commemorative 'Obama shoe' that a campaign volunteer asked him to sign outside the office

Getting involved: Vice President Joe Biden, with his wife Jill Biden, right, and granddaughter Natalie, meets with patrons during a visit to the Landmark Restaurant in Cleveland, Ohio

At ease: Customers laugh and chat with Biden as he tours the Landmark Restaurant in Cleveland. He arrived in the city minutes after Romney

Making friends: Biden kisses a woman during his impromptu stop in Cleveland on his way to meet Obama in Chicago

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In the spirit: Second-graders Brayden Gentzyel, left, as Obama and Harry Perkins, right, as Mitt Romney, from Valley View Elementary School in the York, Pennsylvania lead a parade of students around the school to encourage people to vote

Making a difference: Raena Lamont, 3, wears a Captain America costume at a polling center doubling as a donation site in the Staten Island borough of New York City

Having their say: A long line of voters waits inside the main branch of the Boston Public Library in Massachusetts

Determined: Voters crowd an apartment building hallway as they wait to enter a temporary polling station in the Coney Island section of New York after Superstorm Sandy closed voting stations

Keen: A light wet snow covers the roof and ground around the Jenkins Town Hall as early voters casts their ballots in Jenkins, Minnesota

A world away: Mike Wigart, 30, picks up his ballot at a polling station in the garage of the Los Angeles County lifeguard headquarters

Support: The Romneys share a kiss after voting in Belmont - and ahead of final campaign stops in Ohio and Pennsylvania

Family: Romney hugs his grandson Joe, as his wife Ann and son Tagg look on, after voting during the presidential election in Belmont

He's off! Voters swarm Mitt Romney's car as he drives away from Beech Street Center to catch his campaign plane

Last-ditch votes: Romney greets a family before boarding his campaign plane in Bedford, Massachusetts

Heading off: Romney prepares to board his campaign plane with his son Tagg Romney (left) for two last-minute stops in Ohio and Pennsylvania

Excited: Vice President Joe Biden holds hands with a poll worker as he emerges from the voting booth after casting his ballot in Greenville, Delaware on Tuesday

Devoted: Biden holds the hand of his granddaughter Natalie as he arrives with his family to vote in Greenville

Heading out: Biden and his wife Jill wave as they depart New Castle, Delaware en route to Chicago to join President Obama

Talking it through: Republican vice presidential candidate Paul Ryan votes accompanied by his children Charlie, Sam and Liza in Janesville, Wisconsin

Are you sure? Ryan casts his ballot with his wife Janna, son Charlie and daughter Liza on election day in Janesville

Helping hand: Ryan meets with voters and polling volunteers as he casts his votes in Janesville accompanied by his children

Raring to go: Ryan gives the press a thumbs-up while speaking to senior adviser Dan Senor on board the campaign plane en route to Cleveland

Reunited: Romney and Ryan walk off Romney's plane in Cleveland, Ohio. Ryan had arrived moments earlier on his own plane and met Romney on board

Standing strong: Romney and Ryan pose with members of Ryan's family at Cleveland Hopkins International airport

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Queue: Voters line up to cast their ballots outside a polling station in the East Village neighborhood of New York

Long wait: William Wright, left, and India Johnson, both freshmen at Old Dominion University, wait to vote in Norfolk, Virginia

Crowd: The media watches as Congressman Todd Akin vote at the Star Bridge Christian Center in Wildwood, Missouri, where he is running for U.S. Senate

Creative: People cast their ballot at a polling station in a laundromat in Chicago, Illinois as Romney and Obama battle for the presidency

Fans: Three Obama supporters walk around the south side of Chicago, Illinois wearing Obama and Romney masks holding placards asking people to vote

Words of encouragement: Former Secretary of State Condoleezza Rice attends a Get-Out-To-Vote Event for support of Romney in Davie, Florida

Getting ready: Residents wait in line in the pre-dawn hours to vote at a historic property called the Hunter House at Nottoway Park in Vienna, Virginia

Long wait: People wait in a line to vote in the presidential election at a polling site in Arlington, Virginia on Tuesday morning

Making a difference: Voters fill out their ballots at the First Church of the Open Bible in Des Moines, Iowa

Voting for two: Samantha Pelletier shows off the voting sticker that was placed on her pregnant belly in Bristol, New Hampshire

Dedicated: Voters fill out their ballots at Washington Mill Elementary School in Fairfax County, Virginia

Emotions high: Tears streaked down Obama's cheek during his last campaign rally Des Moines, Iowa

Smiles: In Des Moines, Iowa, Obama savoured but also lamented what would be the last time he would ever hold a campaign rally - for himself, at least

Emotions: Ann Romney wipes away tears during her husband's last campaign rally

Last stop: Romney waves to the crowd alongside his wife Ann at his final campaign rally in Manchester, New Hampshire

Embrace: The Republican hugged his wife Ann on stage as the crowd at his final campaign rally cheered

Sea of supporters: Romney speaks during his final campaign rally at the Verizon Wireless Arena in Manchester, New Hampshire

States of the nation: How the voting battleground could shape up coast to coast according to a round up of the latest polls

Early voters: Colby Klein, 2, seated on the floor, waits for her parents to cast their ballots in Los Angeles as her sister Astin Klein, 3

Do it right, Daddy! Scott Fera looks over his ballot with his son, Conan, 4, after his daughter Quinn, 2, have him a helping hand in Sacramento, California

No stopping them: Voters wait in line to cast their ballots under a tent in the Rockaways in New York, which was hit hard by Hurricane Sandy

Advantage Romney: The GOP challenger holds a slender lead in national polls from Rasmussen (left) and Gallup (right) released on Monday 

Swing states: Rasmussen gives Romney a two-point lead in Virginia, along with Florida and Ohio - one of the three big battleground states that he almost certainly has to win

Looking to the future: Voters wait in front of the Mt. Pleasant Library in Cleveland, Ohio early on Tuesday to vote in the elections

Tough decisions: People vote at a polling site in Toledo, Ohio on Tuesday morning as the men are almost neck and neck in the polls

Choices: More voters gather around booths in Toledo to make their choice for the president of the United States

In line: People stand in line to cast their votes as the polls opened at a precinct at the Wake County Firearms Education and Training Center in Apex, North Carolina

Patience: People wait in an estimated two-hour long line that goes down around the block to vote at a polling site in Arlington, Virginia

Having a say: Voters wait for their addresses to be checked at the polling station at Metropolitan AME Church in Washington, DC

Proud: Penny the Boston Terrier votes with her owners, Amy O'Neill (left) and girlfriend Michelle Nowakowski in Milwaukee, Wisconsin