Ayers was a professor at the University, I believe, and his past was probably not known to most of his associates (see <a href="http://voices.washingtonpost.com/fact-checker/2008/02/obamas_weatherman_connection.html)">http://voices.washingtonpost.com/fact-checker/2008/02/obamas_weatherman_connection.html)</a> and so I just don???t see this as any kind of issue.