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GOP’s Senate hopes energized by Koch network ad blitz

By Michael Beckel

Can this 'dark money' group help the Democrats keep the Senate?

By Michael Beckel

Why Republican control of Congress hinges on nine big-money Senate races

By Michael Beckel and Dave Levinthal

Koch-funded think tank offers schools course in libertarianism

By Chris Young

Lobbying disclosures leave public in the dark

By Marcelo Rochabrun and Dave Levinthal

‘Dr. Evil’ fuels dogfight between AKC, Humane Society

By John Dunbar and Erin Quinn

Critic of artificial sweeteners pilloried by industry-backed scientists

By Chris Young

Political nonprofits bungle IRS filings

By Michael Beckel

Koch-backed seniors group low-balling election spending?

By Michael Beckel

Lobbying activity declines among top special interests

By Dave Levinthal

Hobbled IRS can't stem 'dark money' flow

By Julie Patel

Saving the penny makes cents for zinc-backed front group

By Erin Quinn

How cozy can candidates be with political groups?

By Rachel Baye

Kochs put a happy face on free enterprise

By Chris Young

Supreme court justices earn quarter-million in cash on the side

By Reity O'Brien