Republican U.S. Senate candidate Dan Winslow of Massachusetts wants same-sex married couples to have the same right to pool their money for political donations as other married couples. But the Federal Election Commission says the Defense of Marriage Act won't allow it. The constitutionality of DOMA is now before the Supreme Court. Charles Krupa/AP hide caption

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Senators Lisa Murkowski, an Alaska Republican, and Ron Wyden, an Oregon Democrat, discussing their new campaign finance legislation at an April 23, 2013 Capitol Hill news conference. Chip Somodevilla/Getty Images hide caption

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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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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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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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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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