GOP senators press IRS to keep nonprofit donors secret

"The privacy interests of donors is widely recognized and valued. Various public policy initiatives have rightly encouraged donations to social welfare organizations, and these efforts are threatened when private information about donors is not adequately protected," the letter states.

The new letter, from Sen. Orrin HatchOrrin HatchGOP lawmakers call for overhaul of proposed corporate tax rules DEA decision against reclassifying marijuana ignores public opinion Trump op-ed counters Clinton’s pitch to Utah voters MORE (R-Utah) and other GOP senators, says that, by requesting the confidential donor names, the agency has set in motion a process that will result in the names being available for public viewing at the IRS when the investigated groups are approved to become a 501(c)(4).

"The IRS appears to be circumventing the statutory privacy protections that Congress has long provided donors," exposing the donors to "possible harassment," the Republicans said."The public release of private donor information exposes citizens to possible harassment and intimidation by those who oppose the goals of the charitable organization."

Republicans and Democrats on Capitol Hill have been clashing over 501(c)(4) and other tax-exempt groups, some of which are spending millions of dollars this year on election advertising. 

The IRS currently says that the primary purpose of 501(c)(4) groups should not be political, which has led some legal analysts to assert that those organizations should use less than 50 percent of their budget on political causes.  

Watchdogs argue groups are misusing the 501(c)(4) tax-exempt status to keep their donors secret as they spend millions on election ads. 

The Republican senators requested that the IRS provide the statutory authority to require donor names, the frequency of requests for the information, and which officials were involved in requesting and approving the "questions requesting donor names," among other issues.

Along with Hatch, the Republican senators who signed the letter were Mitch McConnellMitch McConnellJuan Williams: Trump's race politics will destroy GOP Rank-and-file Republicans fear lame-duck vote on pricey funding bill Clinton, Trump sharpen attacks MORE (Ky.), Mike EnziMike EnziLiz Cheney wins Wyoming House primary Liz Cheney expected to cruise through Tuesday primary Sanford-Enzi 'Penny Plan' gets nation to a balanced budget MORE (Wyo.), Lamar AlexanderLamar AlexanderTenn. senator blasts 'intolerable increase' in ObamaCare prices GOP Rep. Black wins primary fight GOP senators to donors: Stick with us regardless of Trump MORE (Tenn.), John CornynJohn CornynThe Hill's 12:30 Report Top Republican questions Lynch on Clinton Foundation probe Baby dies of Zika in Texas MORE (Texas), Kay Bailey Hutchison (Texas), Jon Kyl (Ariz.), Bob CorkerBob CorkerBolton would consider serving as Trump's secretary of State Trump struggles to land punches on Dems over ISIS GOP senator: Trump calling Obama ISIS founder 'went far too far' MORE (Tenn.), Pat RobertsPat RobertsTrump's new agriculture brain trust includes Rick Perry, Jim Gilmore Newer waters, same river: The Louisiana floods, and a state in turmoil Meet the rising GOP star who already enrages the left MORE (Kan.), John ThuneJohn ThuneApple, Google enlisted for FCC robocall effort Fidelity denies lobbying for student loan tax break Republicans see fresh chance to overhaul telecom law MORE (S.D.) and Rand PaulRand PaulTrump, Clinton boost Snapchat spending Clinton enjoying edge over Trump in Silicon Valley Trump gets little backing from Silicon Valley MORE (Ky.).

— Bernie Becker contributed to this report.

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