The One-China principle faces opposition from supporters of the Taiwan independence movement, which pushes to establish the "Republic of Taiwan" and cultivate a separate identity apart from China called "Taiwanization". Taiwanization's influence on the government of the ROC implies the change of self-identity among Taiwan citizens: after the Communist Party of China expelled the ROC in the Chinese Civil War from most of Chinese territory in 1949 and founded the PRC, the ROC's Chinese Nationalist government, which still held Taiwan, continued to claim legitimacy as the government of all of China. Under former President Lee Teng-hui, additional articles were appended to the ROC constitution in 1991 so that it applied effectively only to the Taiwan Area prior to national unification. However, former ROC president Ma Ying-jeou re-asserted claims on mainland China as late as 2008.