Obama frequently talks of the need to transcend partisanship. And he invokes his support for charter schools — a not-terribly-controversial idea — as evidence that he is willing to challenge Democratic special interest groups.

In fact, there are few examples of him making decisions during the campaign or the transition that offended his own party’s constituencies, or using rhetoric that challenged his own supporters to rethink assumptions or yield on a favored cause.

Has Obama ever delivered a “Sister Souljah speech”?