COLUMBUS, Ohio (AP) -- Groups campaigning over whether to keep or toss out Ohio's new collective bargaining law plan to release new details about their fundraising.

Campaign fiance reports were to be filed with the state Thursday by We Are Ohio, the union-backed coalition that wants the law repealed. The reports will show spending and cash available for the final days before the Nov. 8 election.

Few details were expected Thursday from the side defending the law. Building a Better Ohio's nonprofit status allows little information about its contributions to become public. The Republican-backed group says it will release a list of its donors - just not how much they're giving.

Insiders have predicted the ballot fight could cost more than the $33 million spent in last year's governor's race.