If I recall correctly, he was to make gay marriage illegal. This is what I've heard, and that would be bad.
If a gay couple cannot get married, it means that, in a situation where one of them becomes seriously harmed to the point where they cannot speak for themselves, their loved one cannot make medical decisions for them. This becomes bad if that person's family is gone or cannot be contacted.
There's plenty of other simple things that aren't allowed if you're not married.