'Ohio will have a referendum on whether to approve or reject Senate Bill 5, which was passed earlier this year, and limits collective bargaining rights for public employees. If the election was today, would you vote to approve or reject Senate Bill 5?'
You are simply going to get a lot of people against 'limiting' collective bargaining rights because it sounds ominous when framed like that. Hopefully, there is enough awareness advertisements around Ohio, especially in conservative areas to get people to the polls and understand that this is a nominal change to the collective bargaining system.