Barack Obama and John McCain will urge Americans to go out and vote at the end of one of the most monumental US presidential election campaigns in history today.
Mr Obama leads his Republican rival by more than six points in the latest average of national polls by RealClearPolitics.com, but the McCain campaign insisted it had the momentum and could still come back.
Both candidates will urge Americans to get out and cast their votes as they deliver some of their final speeches in the 21-month, $1.9 billion campaign today.
Democrats unleashed their "persuasion army" of backers scouring their own backyards to encourage people to back Mr Obama in the campaign's waning hours yesterday.
More than 10,000 Obama volunteers were knocking on doors in Ohio and expected to hit their one millionth home after a five-day push. His campaign also reported that Saturday was its largest volunteer day, with more volunteers showing up to work the phones and walk neighbourhood precincts than ever before in the campaign.
"Our volunteers are completely engaged," Obama campaign spokesman Bill Burton
said.
At a rally in the state yesterday, Mr Obama added: "Go vote right now. Do not delay because we have work to do."
And the Republican Party launched the last stage of its "72-hour programme" with volunteers descending on competitive states for the final stretch.
Rich Beeson, the political director of the Republican National Committee (RNC), said: "There's no doubt that we've got an uphill battle."
But he added: "I'm not going into election day with any trepidation that they've put any state away" by banking early votes. "We still have a lot of voters that we can and will turn out."
About 27 million absentee and early votes were cast in 30 states as of Saturday night, more than ever before, and Democrats outnumbered Republicans in pre-election day voting in key states.
Mr Obama plans visits to Florida, North Carolina and Virginia later today while Mr McCain is heading to Florida, Virginia, Indiana, New Mexico, and Nevada as both men continue their hectic campaign schedules.
Some of the closest battleground states were Florida, Ohio, North Carolina, Missouri, and Indiana.
All were won by Republican president George Bush, but have been made competitive by Mr Obama's record-shattering fundraising operation which saw his campaign bring in $150 million dollars in September alone.
Both campaigns were also running aggressive ground games elsewhere, including Iowa, New Mexico, Pennsylvania, New Hampshire, Colorado and Virginia.
PA