If Kasich had been smart enough to exempt safety forces (police and fire), as they did in Wisconsin and I think in Indiana too, the legislation would probably have passed and relatively easily. The police and fire fighters’ ads drew a far more sympathetic response that anything any other categories (including teachers) could have thrown at it. It was a miscalculation but it should not have much if any effect on this year’s presidential numbers.
Also, the Republicans didn’t do a good job at informing the electorate on what collective bargaining entailed. They didn’t run very many ads or put out a lot of information. Some people in Ohio think that teachers are gods.