The new measure, if enacted, would set up potentially insurmountable roadblocks before the IRS could begin an investigation into a violation of the prohibition, said David Thompson, vice president of public policy for the National Council of Nonprofits, which opposes changes to the provision.

“We aren’t in the dark money business,” Thompson said. “We are nonpartisan, and when someone tries to turn us partisan, we are no longer effective.”

The proposed changes would include new procedures and wait times for beginning an investigation, including obtaining permission from the IRS commissioner and giving notice to the House Ways and Means and the Senate Finance committees. “It’s an intentional, convoluted series of hurdles that ensures an investigation never happens,” Thompson said.