It appears that the government is taking citizenship seriously, but, unfortuneatly it is not the United States Government. http://www.chinapost.com.tw/taiwan/national/national-news/2009/02/10/195501/Former-legislator.htm
It appears that a Taiwanese legislator Lee Ching-An was illegally elected to city councils and the Taiwanese national legislature because he had dual citizenship. While dual citizenship is an oxymoron as one cannot have two masters, at least in Taiwan they don't let dual citizens in elected office. Interestingly enough, naturalized citizens in Mexico cannot hold any elective or executive office at any level.
"Last Friday, the Central Elections Commission revoked its declaration of Lee's election as a member of the seventh Taipei City Council and of the fourth, fifth and sixth Legislative Yuans and annulled all relevant election certificates she received from 1994 to 2005, after determining that she held U.S. citizenship during that period.
The CEC action did not cover her election to the seventh Legislative Yuan in 2008, a post she resigned amid mounting public pressure on Jan. 8, 2009, nearly one year after it was discovered that she had never formally relinquished her U.S. citizenship.
Taiwan's Nationality Act requires those holding dual citizenship to surrender their foreign citizenship before assuming public office."
Glad to see that someone is serious about loyalty and citizenship. Shall we start with the first alien president?