In this Oct. 13, 2008 file photo, then-Democratic presidential candidate, Sen. Barack Obama, D-Ill., campaigns at the Seagate Convention Centre in Toledo, Ohio. All that campaign money this election and last. Well, it was just prologue. The next election will be an explosion of political cash that political strategists and campaign experts say will eclipse the $5.3 billion spent in the 2008 and the $4 billion anticipated tab this year, further eroding attempts to control money in politics.  (AP Photo/Jae C. Hong, File)
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