From the BBC article “Nasa to rethink Hubble decision”:

Following Mr O’Keefe’s decision [to abandon the Hubble telescope] Senator Barbara Mikulski, whose home state of Maryland hosts the Hubble Space Telescope Science Institute, sent a letter asking him to reconsider his decision.

In reply, Mr O’Keefe wrote: “I have asked Admiral Hal Gehman, Chair of the Columbia Accident Investigation Board, to review the matter and offer his unique perspective.

“[He] has agreed to undertake this review and offer his view in a thoughtful and expeditious manner.”

In a statement Senator Mikulski said: “When someone is told they need major surgery, any prudent person would get a second opinion.

“That’s what I told Administrator O’Keefe and that’s what he has agreed to do. Hubble has made so many extraordinary contributions to science, exploration, and discovery,” she continued.

“We cannot prematurely terminate the last servicing mission without a rigorous review.”

Thanks for questioning, Senator Mikulski!