 Politically, Tseng stated that she preferred to keep a low profile for her husband's sake.However, she became the subject of controversy in 2000 when New Party politicians Elmer Fung, Hsieh Chi-ta, and Tai Chi accused her of attempting to flee to New York City with a suitcase containing NT$85 million.In response, she filed a defamation suit against them on 29 March 2000, making her the only first lady in Taiwan's history to become involved in a lawsuit.