Military and bureaucratic aristocrats fully controlled political parties between 1946 and 1980s. Most parties in Thailand are short-lived. Between 1992 and 2006, Thailand had a two-party system. Since 2000, two political parties dominated Thai general elections: one was the Pheu Thai Party (which was a successor of People's Power Party and the Thai Rak Thai Party), and the other was the Democrat Party. The political parties which support Thaksin Shinawatra won the most representatives every general election since 2001. Later constitutions created a multi-party system where a single party cannot gain a majority in the house.