The investigation is back on into the alleged illegal campaign activity surrounding Gov. Scott Walker and two dozen conservative groups.

The Chicago-based 7th U.S. Circuit Court of Appeals ruled Wednesday that state courts are the proper venue to resolve legal issues with the case, according to an article by the Associated Press.

The ruling stems from a case filed in February by Eric O’Keefe, director of the Wisconsin Club for Growth, to halt the secret John Doe investigation that has been ongoing since 2012. The lawsuit argued the investigation was a violation of the group’s first amendment rights and an attempt to criminalize political speech.

Even with the ruling, the investigation won't be able to resume immediately, according to the Associated Press.

The ruling comes less than two months before Walker is up for re-election against Democrat Mary Burke. It is seen as a blow to Walker and conservatives who have maintained they have done nothing wrong and the investigation is politically based.