Americans for Prosperity, the political nonprofit formed with the backing of conservative billionaires David and Charles Koch, gave a $100,000 grant to another dark money group linked to the Kochs in 2012, according to tax forms filed Friday with the IRS. 
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Americans for Prosperity, the political nonprofit formed with the backing of conservative billionaires David and Charles Koch, gave a $100,000 grant to another dark money group linked to the Kochs in 2012, according to tax forms filed Friday with the IRS. 

Read more.