An outside group cutting large checks to oust Nebraska’s senior GOP senator, while slamming her for “D.C. Swamp” ties, is heavily funded by a massive Democratic dark money group in Washington, D.C., and LinkedIn co-founder Reid Hoffman.

Nebraska Railroaders for Public Safety, a super PAC calling itself “a voice for the working people” in the deep red state of Nebraska, has spent $432,000 on ads opposing Sen. Deb Fischer (R-NE) and boosting Dan Osborn, a U.S. Navy veteran and industrial mechanic running as an independent, according to Federal Election Commission filings. But none of the PAC’s public war chest appears to have actually come from donors in the Cornhusker State.