It is from "One Nation" PAC, which is:
https://www.sourcewatch.org/index.php/One_NationOne Nation is a dark money group run by Karl Rove's top operatives who run Crossroads GPS and American Crossroads. According to the organization's website "One Nation is a 501(c)(4) organization that will utilize paid communications, public opinion research and grassroots-level advocacy to shape attitudes on major issues and mobilize citizens to take action by contacting and interacting with policymakers in Washington."
The bill they refer to isn't out of committee yet. https://www.congress.gov/bill/115th-con ... -bill/2577
I looked and couldn't find a press release on the day they cite or one about this bill. https://www.mccaskill.senate.gov/media- ... s-releases
This is the news article they cite, which doesn't mention McCaskill but is pretty much a Hawley press release about his attempts to do something about it. https://www.news-leader.com/story/news/ ... 716133002/
In a spoiler for bandwidth.