A woman views a Mitt Romney campaign ad in September, a month after the launch of an online government database that is supposed to make it easier for the public to see what political ads air in big markets, and how much is spent on them. Karen Bleier /AFP/Getty Images hide caption

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Karen Bleier /AFP/Getty Images

Gay Lobbying On The Hill Has Short Yet Strong History

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Former Alaska Gov. Sarah Palin addresses the Conservative Political Action Conference at the Marriott Wardman Park Hotel in Washington, D.C., last year. Mark Wilson/Getty Images hide caption

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Mark Wilson/Getty Images

For Some Conservatives, It's Homecoming Week

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David Koch, executive vice president of Koch Industries, attends an event at The Economic Club of New York last year. Mark Lennihan/AP hide caption

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Mark Lennihan/AP

After Tough 2012, Conservative Koch Brothers Regroup

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The Supreme Court denied the petition of businessmen who say the 2010 Citizens United ruling makes it legal for corporations to contribute directly to candidates. The court building is seen here during renovations in December. Alex Wong/Getty Images hide caption

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The U.S. Supreme Court agreed to hear a challenge to campaign-finance laws that could open the door to further money in politics beyond what Citizens United achieved. Chip Somodevilla/Getty Images hide caption

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Chip Somodevilla/Getty Images

Sen. Robert Menendez of New Jersey, shown in June, has come under scrutiny before, but has never been charged. Mike Coppola/Getty Images hide caption

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Mike Coppola/Getty Images

How New Jersey's High-Flying Sen. Menendez Ran Into Turbulence

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Screenshot of a 2012 TV ad, featuring actor Clint Eastwood for Mitt Romney, by the Republican group American Crossroads. Screenshot of American Crossroads Ad hide caption

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Screenshot of American Crossroads Ad

Obama's Record On Political Money One Of Ambivalence

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Tourists take photographs in front of the U.S. Capitol on Jan. 2, the day after Congress passed a bill to avoid the fiscal cliff. Saul Loeb/AFP/Getty Images hide caption

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Saul Loeb/AFP/Getty Images

Even Without Earmarks, Tax Breaks And Special Deals Fill Bills

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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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J. Scott Applewhite/AP

Critics Decry Looser Rules For Inauguration Fundraising

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