Interesting, I just listened to the senate hearing video.
In no way did Watt mention shuttering Fannie and Freddie completely. He did mention that new mortgage reform needs to happen to take the taxpayers off the hook in case of a housing catastrophe, and that he's open to discussion about how to approach it. He applauded the efforts of Warner-Corker to get the discussion moving but not once did he say he agreed with it.
Not abolish, release to private sectors. FNMA is not disappearing it is giving it back to the shareholders, where its undertaking would be brought on by shareholders not the taxpayers.