(Trent Nelson | The Salt Lake Tribune) Labor leaders turn in boxes of signatures in their attempt to qualify a referendum repealing an anti-union bill, at the Salt Lake County Clerk's office on Wednesday, April 16, 2025.(Trent Nelson | The Salt Lake Tribune) Boxes of signatures are checked in at the Salt Lake County Clerk's office as labor leaders attempt to qualify a referendum repealing an anti-union bill, on Wednesday, April 16, 2025.(Trent Nelson | The Salt Lake Tribune) Labor leaders turn in boxes of signatures in their attempt to qualify a referendum repealing an anti-union bill, at the Salt Lake County Clerk's office on Wednesday, April 16, 2025.