I don't believe this one will be particularly harmful. The belief that the following prosecutor should resign after her arrest for drunk driving does not seem controversial.
I'll take you one further: this will end up helping Perry. What he did isn't just uncontroversial, it'll be applauded, especially by Republican primary voters. Perry can legitimately claim to be unfairly targeted by liberals for the kind of executive behavior they like. And it all would have gone completely unnoticed but for this indictment. This is the DA's oops.