US presidential candidates have begun making their final pleas for votes
The US presidential candidates have begun making their final pleas for votes during a hectic last day of campaigning that will see them make a frantic dash across key battleground states.
Barack Obama, the Democratic candidate who has retained a lead in most opinion polls, was set to hold rallies in Florida and North Carolina before ending his campaign with a final event in Virginia.
John McCain, his Republican rival, has visited Florida before heading to Virginia, Pennsylvania, Tennessee, Indiana, New Mexico and Nevada before heading to his home state of Arizona.
Obama leads McCain in six of eight key battleground states, including the large states of Florida and Ohio, according to a series of Reuters/Zogby polls released on Monday.