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The US Presidential campaign is set to be the most expensive in history.
Both candidates are on their way to raising a billion dollars (over 773 million euros) by the November 6 election.
They have been spending massive amounts on advertising as well as get-out-and-vote efforts by campaigns and outside groups that have no fund-raising limits.
On Thursday Barack Obama voted early in his home state of Chicago, to encourage other democrats to do so.
After several months lagging behind Obama in fund raising Mitt Romney and his allies overtook their Democratic rivals for the month of October.
Romney’s campaign says it has 169 million dollars left in its campaign coffers while the Obama campaign says it has 123 million – hefty sums for the final push.
In a record breaking spending spree both campaigns have devoted the bulk of their cash to blanketing the airwaves with advertising.
In the first three weeks of October the latest tally by the Wesleyan Media Project shows Romney and his Super Political Action Committees (Pacs) spending more on advertising, but Obama and his allies actually running more ads.
While Mitt Romney may hold the cash advantage in recent months, that has been down to fund raising by his party. Obama’s campaign on its own has dwarfed that of the Republican Candidate.