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Commercial banks donated significant amounts of money to some of the most critical -- and most hotly contested -- congressional races this year.

(Image: Bloomberg News)
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Scott Brown (R)

Republican Sen. Scott Brown voted for Dodd-Frank, but bankers are still backing him in a big way, mostly because of his opponent, CFPB founder Elizabeth Warren. Bankers have given Brown $261,402 this cycle, according to the Center for Responsive Politics. (Image: Bloomberg News)
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Sen. Sherrod Brown (D)

Banks are hedging their bets in Ohio. They reportedly donated $109,492 to Brown, and $114,600 to GOP challenger Josh Mandel, according to the Center for Responsive Politics. (Image: Bloomberg News)
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Sen. Jon Tester (D)

Tester, a banking ally in the war over debit card interchange fees, is bringing in the lion's share of bank donations in his Montana race. The Center for Responsive Politics reported that commercial banks donated $312,568 to Tester this election cycle. (Image: Bloomberg News)
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Sen. Dean Heller (R)

Heller doesn't sit on the Senate Banking Committee, but his experience with banking issues in the House could make the Nevada lawmaker a valuable asset. Commercial banks gave $87,200.
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Rep. James Renacci (R)

Commercial banks have contributed $105,450 to Renacci, an outspoken industry ally, for his reelection campaign in Ohio this election cycle, according to the Center for Responsive Politics.
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Rep. Francisco Canseco

Before being elected to Congress, Canseco was the board president of Hondo National Bank, a four-branch community bank in his home state of Texas. As such, commercial banks are supporting the Texas lawmaker, donating $109,316 to his reelection campaign this season, says the Center for Responsive Politics.
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Rep. Nan Hayworth

Hayworth voted in favor of a number of industry bills during her first term in office, and commercial banks have donated $61,950 to her campaign this election cycle. (Image: Bloomberg News)
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Rep. Michael Grimm (R)

Despite the fact he once went undercover on Wall Street as an FBI agent, Grimm has the backing of bankers for his involvement in several industry-friendly bills. Banks gave the New York lawmaker $75,500 this election season, the Center for Responsive Politics reports.
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Frank Guinta (R)

Though Guinta was just named to the House Financial Services Committee in August, the lawmaker's support on banking issues has won him backing from commercial banks, which gave him $26,950 for his 2012 campaign.
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Robert Dold (R)

Dold has been an active member on the House Financial Services Committee during his first term in office, and commercial bankers are backing the Illinois lawmaker, giving him $87,469 this election cycle, says the Center for Responsive Politics.
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