John McCain and Barack Obama are back on the road with less than a day left in a campaign that's lasted the better part of two years. In a year of extraordinary political developments, one of the big stories is early voting, designed to make the process accessible to more voters and easier on election officials when there's a heavy turnout. Early voters have been standing in line for hours, and tomorrow's turnout may swamp election officials all over the country. Charges of fraud, intimidation and intentional disenfranchisement are already being raised. If the voting is close, legal challenges will delay the results. We hear about new rules and first-time voters, ID checks and provisional ballots, malicious rumors and fears that all the votes won't be counted.