INSTITUTE INDEX: The big money behind the political conventions

Total amount raised by the host committee for the 2012 Republican National Convention in Tampa, Fla.: $55.8 million

Total amount spent on the event: $52.4 million

Total amount raised by the host committee for the 2012 Democratic National Convention in Charlotte, N.C.: $35 million

Total amount spent on the event: $33.4 million

Despite the Democratic convention organizers' pledge to forego corporate donations, amount they got from a committee financed by big companies to rent the Time Warner Arena for the event: $5 million

Rank of Charlotte, N.C.-based Bank of America among the biggest backers of the Democratic convention: 1

Bank of America's total contributions to the Democratic event: $10.9 million

Of that $10.9 million, amount that came in the form of a loan guaranteed by Charlotte, N.C.-based Duke Energy: $10 million

Of that line of credit, amount drawn by the by the convention organizers: nearly $8 million

Date by which the host committee has to pay the money back: 2/28/2013

Rank of Duke Energy among the biggest contributors to the Democratic convention: 2

Amount the company contributed in in-kind donations: $1.5 million

Amount that Duke Energy CEO Jim Rogers, the co-chair of the host committee, personally contributed to the Democratic convention: $339,000

Total contributions to the Democratic event by labor unions: $5.9 million

Rank of Las Vegas casino mogul Sheldon Adelson among the biggest supporters of the Republican convention: 1

Amount he contributed: $5 million

Amount contributed to the Republican convention by the American Petroleum Institute, the oil and gas industry lobby: $2 million

By Florida Power & Light: $1 million

By America's Natural Gas Alliance: $400,000

By David Koch, the billionaire executive VP of the Koch Industries oil and chemical conglomerate and a leading conservative benefactor: $1 million

Amount contributed to the Democratic convention by the Tides Foundation, which is partially funded by George Soros, the billionaire hedge fund manager and a leading liberal benefactor: $310,000

Number of contributions to the Republican convention that came from people giving between $200 and $500: 6

Number of contributions to the Democratic convention that came from people giving between $200 and $500: 1,558

Number of times by which that exceeds the total number of donors to the Republican convention: more than 5

Amount both parties received in government money for the conventions: $17.7 million

Amount each host city received in government grants for security: $50 million

(Click on figure to go to source.)