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 HatchTim Kaine backs call to boost funding for Israeli missile defense Froman: Too early to start trade talks with the UK Bacteria found ahead of Olympics underscores need for congressional action for new antibiotics 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 McConnellPeter Thiel does not make the GOP pro-gay Reid: Trump is a 'hateful con man' McAuliffe: Clinton won't move TPP without changes MORE (Ky.), Mike EnziMike EnziSanford-Enzi 'Penny Plan' gets nation to a balanced budget Majority of GOP senators to attend Trump convention Judd Gregg: The silver lining MORE (Wyo.), Lamar AlexanderLamar AlexanderGOP senators to donors: Stick with us regardless of Trump Overnight Healthcare: Mysterious new Zika case | Mental health bill in doubt | Teletraining to fight opioids Hopes dim for mental health deal MORE (Tenn.), John CornynJohn CornynGOP senators to donors: Stick with us regardless of Trump Hopes dim for mental health deal Overnight Finance: Senate punts on Zika funding | House panel clears final spending bill | Biz groups press Treasury on tax rules | Obama trade rep confident Pacific deal passes this year MORE (Texas), Kay Bailey Hutchison (Texas), Jon Kyl (Ariz.), Bob CorkerBob CorkerTrump starts considering Cabinet Trump's secret weapon is Ivanka Senate Dems introduce Iran sanctions extension MORE (Tenn.), Pat RobertsPat RobertsMeet the rising GOP star who already enrages the left Senators ask IRS to issue guidance to help startups GOP makes new push on wildfire bills MORE (Kan.), John ThuneJohn ThuneTim Kaine backs call to boost funding for Israeli missile defense FCC chief pushes phone companies to offer free robocall blocking How the new aviation law will affect your travel MORE (S.D.) and Rand PaulRand PaulWhat to watch for on Day 2 at the GOP convention Cyber squatters sitting on valuable VP web addresses Majority of GOP senators to attend Trump convention MORE (Ky.).

— Bernie Becker contributed to this report.

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