With a single donation, a conservative group with ties to the Koch brothers has doubled the money backing a ballot measure that would hamper union's political fundraising.
The American Future Fund is an organization affiliated with the Center to Protect Patient Rights, which in turn has reported ties to billionaires Charles and David Koch.
The measure has several provisions, but labor groups are most concerned about its ban on using payroll-deducted money for political purposes. If enacted, the measure would eliminate unions' fundraising staple while leaving corporations relatively unscathed, since they raise their money from executive contributions or by tapping company resources.
The donation signals that a funding fight that was running 10-1 against the measure is far from over.
The Koch brothers, worth an estimated $50 billion, are considered among the conservative movement's most generous donors, although the opaque nature of PAC reporting makes it difficult to know exactly how much they have donated to candidates and causes around the nation.