Secretary Oberstar?
From Star Tribune/Hot Dish Politics:
[T]he president called at breakfast Wednesday morning … Staffers who were gathered with Oberstar at the Duluth Holiday Inn heard Oberstar tell Obama, “Mr. President, I want you to know that while my service in Congress has ended, my commitment to public service has not, and I’m ready to assist your administration in any way.”
To which, the president reportedly replied, “Let’s let the dust settle and talk again.”