 On 15 December 2008, the party endorsed the Democrat Party, forming a six-party coalition government under Prime Minister Abhisit Vejjajiva.The party's "de facto" leader and power broker behind joining the Democrat-led coalition is Newin Chidchob.Due to his role as an executive of the PPP predecessor party, the Thai Rak Thai party which was dissolved in 2007, he became ineligible to be a party member for five years.