In 2003, President Chen Shui-bian proposed holding a referendum in 2006 for implementing an entirely new constitution on May 20, 2008 to coincide with the inauguration of the 12th-term president of the ROC. Proponents of such a move, namely the Pan-Green Coalition, argue that the current Constitution endorses a specific ideology (i.e., the Three Principles of the People), which is only appropriate for Communist states; in addition, they argue that a more "efficient" government is needed to cope with changing realities. Some proponents support replacing the five-branch structure outlined by the Three Principles of the People with a three-branch government. Others cite the current deadlock between the executive and legislative branches and support replacing the presidential system with a parliamentary system. Furthermore, the current Constitution explicitly states before the amendments implemented on Taiwan, "To meet the requisites of the nation prior to national unification...", in direct opposition to the pan-green position that Taiwan must remain separated from the mainland. In response, the pan-blue coalition dropped its opposition to non-constitutional referendums and offered to consider through going constitutional reforms.