In 2003, during her second term on the Legislative Yuan, Chang Tsai discussed electronic waste originating from compact discs. Later that year, the Association Monitoring the Nomination of Grand Justices placed her on a list of worst-performing legislators. After losing a July 2004 party primary to Ko Chun-hsiung, Chang Tsai left the Kuomintang, joined the Alliance of Independent Lawmakers, and lost the subsequent general election to Ko.
