After an epic campaign, voters could also spark a political realignment in
History’s longest, most costly White House campaign ends with Democrat Obama the hot favourite, with wide leads in national polls and the edge in a string of battleground states which could swing the election either way.
In the eye of the worst financial storm since the 1930s and with US troops embroiled in wars in Iraq and Afghanistan, both Obama and McCain have vowed to restore the frayed self-confidence of the world’s lone superpower.
Both Obama and McCain will be chasing the 270 electoral votes needed across the diverse state-by-state electoral map to take the White House with more than 100 million people trekking to the polls to add to 30 million advance votes already cast.
Hours later, the rest of the will follow suit, with first results not expected until 7:00 pm eastern time (2300 GMT).
Obama and McCain, one of whom will become the first sitting senator elected president since John F. Kennedy in 1960, careened to the finish line on Monday, with competing cross-country campaign blitzes.
"We are one day away from changing the United States of America," Obama, 47, said in Florida, before heading off to whip up crowds in North Carolina and Virginia, hoping to squeeze his rival on normally Republican territory.
But McCain was defiant, vowing to confound pollsters and pundits and overcome a treacherous political map which has him struggling to cling onto Republican bastions and on which one big loss could make Obama president.
"The Mac is back!" he roared at his campaign stops, promising a stunning act of political escapology that would confound almost every major opinion poll.
The Republican nominee raced through
But the fact that all but
Senator Obama, the son of a Kenyan father and white mother from
In a tragic turn of events Monday, Obama learned that Madelyn Dunham, the white grandmother who had brought him up, had died in his native
Obama built a huge grass roots political movement which he hopes will drive millions of first time voters to the polls and stifle McCain’s comeback hopes.
He promises to alleviate the economic pinch for the middle class with "a new politics for a new time" and repair ties with US allies, open talks with foes like and , bring troops home from and refocus on the Afghan war.
McCain, leveraging his heroism as a Vietnam War prisoner and decades of experience in
He has lambasted Obama for "socialist" tax policies, and argues his rival is unprepared for an age of global turmoil and would pursue a more hawkish line towards US enemies and .
McCain though has lambasted Bush policies on climate change and savaged the early conduct of the war.
He parried Obama’s crusade for change by running as a maverick, but the Democrat seems to have saddled him with Bush’s unpopular legacy.
McCain’s pick of untested Alaska Governor Sarah Palin as his running mate was also controversial and prompted Obama to label him as erratic.
With polls showing 90 percent of voters believe is on the wrong track, Obama should be a lock for victory, but whether his race or lack of experience could give voters pause is an intangible.
Polls make Obama the hot favourite, though McCain aides dispute the numbers and point to a late tightening of surveys in key states to argue he can still win.
A new Wall Street Journal-NBC News poll put Obama ahead 51 percent to 43. A Washington Post-ABC News poll said the race was so far Obama’s by 54 percent to 43, and Rasmussen said had him up 51 percent to McCain’s 46.
The final Gallup Daily tracking poll before the Election Day said Obama was leading the race 53 percent to 42 percent.
The Democrat has an easier path to the 270 electoral votes and has a small but solid lead in many of the battleground states needed to win the White House and may be building an advantage as millions of Americans vote early.