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New lists compiled by the Center for Responsive Politics, a MacArthur grantee, provide an easy way to see the organizations and individuals donating the most money to federal campaigns and committees. The lists highlight the partisan and ideological slants of organizations and individuals and how they have shifted since 2012. Eight of the top 20 hard money donors in 2014 support Democratic and Republican candidates and parties equally, while none of the top 50 outside money donors do the same.

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