A federal appeals court on Wednesday overturned a lower court's ruling halting an investigation into Wisconsin Gov. Scott Walker and more than two dozen conservative groups for alleged illegal campaign activity.
The ruling by the 7th U.S. Circuit Court of Appeals in Chicago is a defeat for Walker and conservatives who argued they have done nothing wrong and that the investigation is a partisan witch hunt designed to chill political speech. Walker is running for re-election this fall against Democrat Mary Burke and is considering a 2016 run for president.
Even with the ruling, the investigation won't be able to resume immediately.