Center wins first Pulitzer!

Black lung investigation honored

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Koch brothers pour more cash into think tanks, ALEC

By Paul Abowd

Billionaire Koch brothers continue to shower free-market causes with tax-exempt gifts.

Daily Disclosure: Koch-funded groups attack Obama for 'war on coal'

By Rachael Marcus

Billionaire-backed nonprofits press defense of coal industry with ads knocking president's policies.

Nonprofit profile: Americans for Prosperity

By Paul Abowd

Quick stats on Americans for Prosperity, supporting conservatives

Koch brothers wade into Wisconsin union fight

By Jeremy Borden

Americans for Prosperity, a nonprofit funded in part by the conservative billionaire Koch brothers, has launched a 30-second television adve

Koch's low profile belies political power

By Kevin Bogardus

Private oil company does both business and politics with the shades drawn