Bill Hillsman (North Woods Advertising)

Basing pay on ad spending could create a consulting conflict of interest

Consultant profile: Major Clients in 2003-2004: George W. Bush (R), Republican National Committee

Major clients in include Democratic National Committee, Sierra Club Voter Education Fund, and John Kerry

How we did it: anatomy of an investigation

Candidates become mere pawns as big-money groups duke it out with attack ads

Tax-exempt nonprofits are reporting only a fraction of what they're raising and spending

Quick stats on the U.S. Chamber of Commerce

Obama's 'failing agenda' subject of new negative ad blast from big outside-spending nonprofit.

Top fundraisers closely tied to lobbying powerhouses despite president's anti-lobbyist pledge.