For Tax-Exempt Groups, How Much Politics Is Too Much?

The IRS is under fire for directing additional scrutiny toward conservative groups seeking 501(c)(4) status. But the controversy reveals a question with no clear answer: Precisely what are so-called social welfare organizations allowed to do in electoral politics?

Source: http://www.npr.org/2013/05/13/183700362/irs-under-fire-for-targeting-conservative-groups?ft=1&f=1014

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