By Dave Levinthal, Center for Public Integrity cigarettes

Tobacco giant Reynolds American Inc. last year helped fund several of the nation’s most politically active — and secretive — nonprofit organizations, according to a company document reviewed by the Center for Public Integrity.

Reynolds American’s contributions include $175,000 to Americans for Tax Reform, a nonprofit led by anti-tax activist Grover Norquist, and $50,000 to Americans for Prosperity, a free-market advocacy outfit heavily backed by billionaire brothers Charles and David Koch.