The result is too close to call, and could even be a tie that will make for edge-of-the-seat election viewing. By any standards, November 7 promises to be a thriller.
A US president is chosen not in a single nationwide election, but as a result of 51 separate elections in each state and the District of Columbia, in which a majority is enough for outright victory. Americans don't vote directly for a candidate, but for a slate of special electors in each state, chosen by the party. These electors, 538 in number, make up the electoral college that in early January will either reconfirm Barack Obama as the 44th president, or install Mitt Romney as the 45th. Beyond that, everything is up in the air.
Landslides of the Eisenhower or Reagan variety are a thing of the past. In the modern polarised and almost equally divided America, 2008 may prove as close as we come when, in circumstances ideal for a Democrat, Obama won by 53 per cent to 47 per cent in the popular vote, by 28 states (and DC) to 22, and by 365 to 173 votes in the electoral college.
By contrast, George W. Bush's win in 2000 came down to 537 votes in Florida, and just four votes in the electoral college, one more than the minimum needed. Overall, he lost the national popular vote to Al Gore by 544,000 votes. Four years later, had just 60,000 people in Ohio voted for John Kerry instead of Bush, Kerry would have become president. This time around could be as close or closer than 2004 and even more controversial.
Perhaps the electoral college this time will fulfil its most valuable function, translating a narrow edge in the popular vote into a clear majority of electoral votes. But it may not be so simple. Consider a few scenarios. The most straightforward is where a candidate wins the popular vote but is defeated in the electoral college. Even before 2000, that had happened three times. Were that to happen, the most likely beneficiary would be Obama, on the plausible assumption that he is soundly defeated by Romney in the red states, loses votes in safe Democratic states, but squeaks through in just enough of the hotly contested swing states to win. In that case, justice of a sort would be done, after Bush's win in 2000. There would also be fresh demands that the electoral college be scrapped but with no greater likelihood of success than before.