 As the 2003 SARS outbreak hit Taiwan, Wu and fellow TSU members Liao Pen-yen, Lo Chih-ming, Huang Chung-yuan, and formed a working group to confront the issue.Fredrick Chien consulted Wu, among several others, when asked to form a committee to probe the 3-19 shooting incident, which injured Chen Shui-bian and Annette Lu.In October 2004, Wu withdrew from consideration as a TSU candidate for the legislative elections planned in December, and consequently was not nominated for another term.