IRS Almost Never Audits 'Dark Money' Nonprofits, Documents Show

"Dark money" nonprofit groups, including many that enjoy a preferred tax status because they purport to be focused on "social welfare," are barred from engaging in electoral politics as their primary activity. But the Internal Revenue Service (IRS), which is charged with policing the groups, almost never audits them to see if they're spending too much money on politics, according to new information obtained by the Center for Public Integrity.