Well that is interesting since my google search of “Fredric Woocher” + Obama indicates that Woocher did contribute money to Obama, it does not however indicate that Obama has been a client of Woocher in any matter, not even a case related to the NBC Question.
http://www.google.com/search?hl=en&lr=&as_qdr=all&q=%22Fredric+Woocher%22+obama&start=20&sa=N