Wal-Mart To Leave Conservative Legislative Group

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Bill Koch (center) celebrates his team's 1992 America's Cup win. Koch, the brother of billionaire GOP donors Charles and David, has given $2 million to the superPAC backing Mitt Romney. Vince Bucci/AFP/Getty Images hide caption

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For A Billionaire, $2M Gets You Superdonor Status

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Secret Political Donors Find Ways To Stay Anonymous

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Donation Gap Narrows Between Obama, Romney

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Even Before 'Citizens United,' Big Donors Dominated

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Appeals Court Moves Toward Identifying Donors

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Do Campaign Ads Seem More Negative This Year? It's Not Just You

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Former House Speaker Newt Gingrich pauses while announcing that he is suspending his presidential campaign Wednesday in Arlington, Va. Evan Vucci/AP hide caption

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Gingrich Out Of The Race, But Still In Debt

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Republican presidential candidate Mitt Romney greets supporters in Aston, Pa., on April 23. Jessica Kourkounis/Getty Images hide caption

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Romney's Big-Dollar 'Bundlers' Stay Anonymous

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President Obama boards Air Force One at Andrews Air Force Base in Maryland, en route to Florida, on April 10. Whenever a president runs for re-election, his travel tends to become a political issue. Cliff Owen/AP hide caption

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As The Campaign Hits Cruising Altitude, Critics Again Target Presidential Travel

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Charity Status Of Conservative Group Challenged

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Mitt Romney may like to say the president is out of ideas, but Obama's re-election campaign is definitely not out of money. Chip Somodevilla/Getty Images hide caption

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Campaign Finance Disclosures Mark A Turning Point

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Presidential Fundraising Numbers Poised To Skyrocket

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Conservative Group's Charity Status Draws Questions

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