The Constitution provides citizens with the right to change their government peacefully, and citizens exercised this right in practice through periodic, free, and fair elections held on the basis of universal suffrage. The country is a parliamentary democracy governed by the political party or parties able to form a majority in the lower house of its bicameral Diet. The LDP and the New Komeito Party formed the existing coalition government. Except for a brief hiatus in the 1990s, the LDP has been the dominant party in every government since the mid-1950s. The last general elections were held in on September 11, 2005, and elections for the Upper House were held in July 2003.