At a news conference last month, New York City Mayor Michael Bloomberg stands with people who have been affected by gun violence. John Moore/Getty Images hide caption

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Bloomberg Puts Millions Behind Gun Control Push

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Obama's Campaign Turned Advocacy Group Raises Questions About Money

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Construction was under way on Capitol Hill in November for President Obama's Inauguration Day ceremonies. J. Scott Applewhite/AP hide caption

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Critics Decry Looser Rules For Inauguration Fundraising

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Former U.S. Sen. Chuck Hagel, R-Neb., speaks at the White House on Monday after President Obama nominated him to replace Defense Secretary Leon Panetta. Mark Wilson/Getty Images hide caption

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Lobbying Battle Over Hagel Under Way Before Obama's Nod

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Republican strategist Karl Rove, shown at the Republican National Convention in August, is arguing for continued secrecy for the new class of million-dollar political donors. David Goldman/AP hide caption

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Conservatives Invoke NAACP Case In Fight For Secret Donors

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NRA: 'Only Thing That Stops A Bad Guy With A Gun Is A Good Guy With A Gun'

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In this photo illustration, a Rock River Arms AR-15 rifle is seen with ammunition. Joe Raedle/Getty Images hide caption

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Financial Ties Bind NRA, Gun Industry

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A visitor handles a revolver at a Smith & Wesson display during the NRA Annual Meetings and Exhibits on April 14 at America's Center in St. Louis, Mo. Whitney Curtis/Getty Images hide caption

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Single-Issue Solidarity Behind NRA's Clout

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Sen. Jim DeMint, R-S.C., talks on the phone in his Capitol Hill office on Dec. 6, the day he announced he will resign from the Senate and lead the Heritage Foundation. Alex Wong/Getty Images hide caption

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DeMint And Heritage: Playing Off Each Other's Strengths

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U.S. Rep. Joe Baca of California, shown at the 2008 Democratic National Convention, learned the power of superPACs firsthand this year, when he lost for the first time since he was elected in 1999. Jae C. Hong/AP hide caption

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How To Oust A Congressman, SuperPAC-Style

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Peter G. Peterson speaks at the Fiscal Summit in Washington, D.C., last year. The event was sponsored by the Peter G. Peterson Foundation. Jason Reed/Reuters/Landov hide caption

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Fiscal Cliff Siren: Meet The Man Behind The Curtain

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A supporter of President Barack Obama raises his arms as it is announced that Obama was re-elected during an election night watch party in Chicago. Jerome Delay/AP hide caption

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With Millions Spent, GOP 'Investors' Saw Little Return Election Night

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Karl Rove, former adviser to President George W. Bush, speaks last year in Corpus Christi, Texas. Rove is the chief fundraiser for the biggest outside spender this election season: the twin groups American Crossroads and Crossroads GPS. Michael Zamora/AP hide caption

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Outside Groups Spend Big On Elections, But Don't Have Much To Show For It

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