"Political Activities of the Koch Brothers"
Wikipedia
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New ad campaign goes after pro-Obamacare politicians. "A conservative advocacy group backed by the billionaire Koch brothers said Thursday it will spend $2.5 million on television advertisements targeting three vulnerable Democratic senators who supported President Obama's health care law...[T]he ads [are] against Senators Kay Hagan of North Carolina, Mary L. Landrieu of Louisiana and Jeanne Shaheen of New Hampshire" Sheryl Gay Stolberg in The New York Times.