Here’s a rundown of some weird facts about politics and elections:

1. Politicians are almost never photographed wearing sunglasses. They know that if a person's eyes are hidden, people trust them less.

2. In Nevada, you can vote for “none of the above.”

3. Titles are forever. Once you’ve been elected president, people will always call you Mr. President.

4. Four times in American history, the candidate with fewer votes wound up being president. The last time this happened was in 2000 when George Bush was elected, despite losing the popular vote by 500,000 votes.

5. Election day is always Tuesday because in the mid-19th Century, the US was an agrarian nation and it simply took a lot of time for farmers to drive the horse and buggy to the nearest polling place. Saturday was a workday on the farm, travel on Sunday was out, and Wednesday was a market day. That left Tuesday.

6. At the debates, the president frequently jabbed his hand, with his thumb resting atop a loosely curled fist, to emphasise a point. On a subconscious level it's phallic, she says. "It's sexually male. Men put out their thumb and it says 'I am a man'." And pointing the index finger is simply seen as rude and too aggressive.

7. Romney could be elected president and Joe Biden re-elected vice-president.

Under the US constitution, if the electoral college (the sum of electoral votes from each state - 270 and you're president) ends in a tie - and there are several scenarios under which this could occur - the election is sent to the 435-member House of Representatives.

This is currently Republican-controlled and is unlikely to change hands, so they would choose Romney.

But under the same clause, the Democrat-led Senate would choose the vice-president - Joe Biden.

8. Obama and Romney use the word "folks" far more often than the word is typically heard from the lips of men with their socio-economic and cultural backgrounds.

9. On 6 November, the election will effectively be decided by less than a third of the US population.

10. The only state where it is not necessary to register in order to vote is North Dakota.