some interested stats in here:
http://www.cbc.ca/news/world/story/2012/11/05/f-us-election-campaign-final-day.html
I like this part:
World poll
If the U.S. vote were open to non-Americans, Obama would be the resounding winner. A 21-country survey done by GlobeScan/PIPA for the BBC World Service showed that given the choice between the current president and Romney, most people would vote Obama. France is the most fervently pro-Obama, with 72 per cent saying they want him to be re-elected, followed by Australia (67 per cent), Canada (66 per cent), Nigeria (66 per cent) and Britain (65 per cent). Of the nations polled, only Pakistan favoured Romney (14 per cent) over Obama (11 per cent), with the vast majority (75 per cent) expressing no opinion.
and campaign spending
Obama's immediate campaign team spent over $540 million, the party spent $263 million and Democrat-friendly political action committees (known as "super PACs") chipped in another $127 million, for a total of $931,471,420.
On the Republican side, Romney's team spent $336,399,297, the party spent $284,156,290 and pro-Republican super PACs supplied $402,198,146, for a total of $1,022,753,733.