Reprinted with permission from ProPublica.
By Derek Willis, ProPublica and Maggie Severns, Politico.
Allies of Senate Majority Leader Mitch McConnell used a blind spot in campaign finance laws to undercut a candidate from their own party this year — and their fingerprints remained hidden until the primary was already over.
Super PACs, which can raise and spend unlimited sums of money in elections, are supposed to regularly disclose their funders. But in the case of Mountain Families PAC, Republicans managed to spend $1.3 million against Don Blankenship, a mustachioed former coal baron who was a wild-card candidate for a must-win West Virginia Senate seat, in May without revealing who was supplying the cash.…