After big U.S. Supreme Court win, Montana nonprofit suffers string of losses

By Paul Abowd

Democrat Steve Bullock's gubernatorial win a low point for litigious conservative group.

Political nonprofits bungle IRS filings

By Michael Beckel

High-profile groups such as Crossroads GPS and Patriot Majority USA acknowledged mistakes after Center for Public Integrity inquiry.

Koch-backed seniors group low-balling election spending?

By Michael Beckel

The 60 Plus Association tells the IRS it barely spends money on politics — despite funding millions in candidate attack ads.

How to fix the IRS nonprofit division

By Julie Patel

Employees, reformers offer three recommendations for improving the agency's flagging nonprofit division.

Hobbled IRS can't stem 'dark money' flow

By Julie Patel

Budget and staffing cuts, endless congressional investigations keep IRS from investigating activities of political nonprofits.

Is this super PAC subverting disclosure rules?

By Michael Beckel

Georgia's GOP Senate primary has attracted big money from a super PAC funded by two nonprofit groups tied to an Ohio lobbyist.

IRS says liberal group too political for 'social welfare' status

By Michael Beckel

Tax agency rejects pro-Blanche Lincoln group's application for tax-exempt status, calling it too focused on influencing elections.

IRS chief promises stricter rules for 'dark money' nonprofit groups

By Julie Patel

Agency chief says he'll tackle exactly how political 'social welfare' groups can get.

Who’s bankrolling secretive liberal group America Votes?

By Michael Beckel

A dozen anonymous donors accounted for most of the $12.7 million America Votes raised during its last fiscal year.

Tobacco money fuels gay Republicans, business organizations

By Michael Beckel

Reynolds American gave thousands of dollars to politically active nonprofits such as the Log Cabin Republicans, Americans for Prosperity.

Why we have a gift acceptance policy, and what it means for you

By Robin Heller

Transparency is of the utmost importance to us, which is why we want to be upfront about our funding.

Montana state senators raise big bucks with secretive nonprofit

By Michael Beckel

Secretive group connected to GOP state Sens. Jason Priest and Ed Walker raised $900,000 in 2012, new documents show.

CPAC activists urged to fight IRS

By Michael Beckel and Julie Patel

Tax agency called a 'cancer' and 'criminal enterprise' at conservative convention.

Nonprofits spend money on campaigns despite benefactors' warnings

By Julie Patel

Despite warning, four nonprofits spent money on 2012 elections.

Transfers allow nonprofits to spend more money on campaigns, experts say

By Julie Patel

Groups move money to maximize amount that can be used to advocate for or against candidates.

Nonprofits' failure to report political activity to IRS raises questions

By Julie Patel

Nonprofits are required to report poltical activity to the IRS — Center finds three that did not and one that underreported.

Next up: 'Citizens United v. IRS'?

By Dave Levinthal

Conservative group promises to 'pull out all the stops' to fight proposed nonprofit regulations.

Corporate cash helps politicians party on

By Michael Beckel

Inauguration, convention-related groups boosted by corporate contributions.

Top U.S. corporations funneled $173 million to political nonprofits

By Michael Beckel

Analysis of company disclosures reveals steady flow of cash from corporations to social welfare organizations, trade associations.

Dow Chemical backed anti-union nonprofit with $2 million donation

By Michael Beckel and Erin Quinn

Nonprofit opposed pro-union ballot measure in Michigan with help of $2 million from chemical giant.

Pulling back the veil on corporate contributions

By Michael Beckel and Erin Quinn

New database pulls back veil on corporate giving to politically active nonprofits and covert ways companies advance their agendas.

Top politics investigations from 2013

By The Center for Public Integrity

In case you missed it, here are some of our favorite politics investigations from 2013.

Negative ads make Peterson 'more inclined' to run

By Michael Beckel

Democratic lawmaker Collin Peterson says a secretive nonprofit's media blitz makes him more likely to seek re-election.

Liberal heavyweight Patriot Majority USA fueled by secret, big-dollar donors

By Julie Patel

A dark money group expected to play defense for Democrats in the upcoming battle for the U.S. Senate should have plenty in its arsenal.

Center thankful for stellar reviews from charity watchdogs

By Bill Buzenberg

Nation's leading nonprofit evaluators give us accountability rankings to be thankful for.

League of Conservation Voters becoming 'dark money' heavyweight

By Michael Beckel

The liberal League of Conservation Voters is fast becoming one of the nation’s strongest 'dark money' forces.

'Dark money' groups give big to similar nonprofits

By Julie Patel

Politically active nonprofits frequently share money with one another while hiding donors, new tax filings show.

Excerpts from this story referencing "Americans for Prosperity":

"… American Action Network, $25,000 to the 60 Plus Association and $15,000 to Americans for Prosperity. The Institute, the largest trade association of the oil and natural gas i …"

"… , has more than 500 members including BP America, Chevron and ExxonMobil. Americans for Prosperity, backed by oil moguls David and Charles Koch, provided about $486,000 in g …"

"… d the National Federation of Independent Business, which received $20,000. Americans for Prosperity awarded smaller grants to the American Energy Alliance, which spent hefty …"

"… and promotion and $3 million on travel in 2012. Of its advertising output, Americans for Prosperity paid $55.8 million to a right-leaning, Maryland-based contractor, Mentzer …"

Business groups assail political transparency

By Dave Levinthal

Letter from U.S. Chamber, others charge Center for Political Accountability with laying 'disclosure trap' for corporations.

Tea party-aligned FreedomWorks fueled by elite donors

By Michael Beckel

Four unnamed contributors provided most of the $15 million raised last year by the tea party-aligned nonprofit.

Who funds the shadowy nonprofit behind Arizona’s economic development initiatives?

By Nicholas Kusnetz

How Reporter Nicholas Kusnetz attempted to track down supporters of a secretive nonprofit.

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