What did Obama do to change Rev. Wright's divisive views?

Jay Cost at Real Clear Politics asks a question I've been wondering about:

Candidates make all kinds of promises about what they will do, and voters need to find some way to gauge whether they will keep their word. One way to do that is to look at what they have done. By contextualizing Jeremiah Wright in the broader dilemma of American divisiveness, Obama has identified his experience at Trinity as a small instance of a larger problem that plagues the country, the problem to which he intends to dedicate the 44th presidency. It is therefore reasonable to ask what he did - empowered as he was as a high-profile, long-standing parishioner - to change the viewpoint of Wright and Trinity, and whether those efforts were successful.

The essential problem of the speech is that it gives no answer to these queries. Obama recognizes the problem with Wright's viewpoint, feels strongly that it is part of a problem in society that needs to be corrected, but offers no evidence of his work to correct it. Instead, he says, "Did I strongly disagree with many of his political views? Absolutely - just as I'm sure many of you have heard remarks from your pastors, priests, or rabbis with which you strongly disagreed." But there are many ways to "disagree." Did he merely shake his head quietly in the pews and complain to Michelle on the drive back to Kenwood? Or did he do something about it? Many parishioners in many churches or synagogues would do something if their pastors, priests or rabbis went astray on an important issue. Many more would expect a future president to do something.