In 2011, the Ruam Chart Pattana Party merged with the Puea Pandin Party[7] and changed its name to Chart Pattana Puea Pandin.[8] In the election on 3 July 2011, the party won 7 of the 500 seats in the House of Representatives, five constituency-based and two on the party list. Four of its constituencies were in Nakhon Ratchasima, the party's stronghold and home province of its leaders. After the elections and Pheu Thai Party's victory, the party agreed with Pheu Thai and three other minor parties to form a coalition government under the leadership of Yingluck Shinawatra. Later in 2011, the party name was again simplified to its current version.
Sophon Kaosoo, 50, a Chart Pattana Party candidate, was killed while campaigning in the local council elections, due to take place on 2 March 2014. Police believe that the assassination was most likely politically motivated.[13]
Later, at the 2/2022 Extraordinary Annual General Meeting on Monday, 26 September 2022 in Nakhon Ratchasima Province, the meeting resolved to change the party regulations and the name of the party to the Chart Pattana Kla Party.[14] At the same time, there was also a resolution to elect Korn Chatikavanij, former leader of Kla Party, to be a member of the party's executive committee.[15]
The party won only two seats in the 2023 general election.[16] Korn announced on 25 June 2023 that he had resigned his leadership position.[17] The party will elect a new leader and executive committee in early August 2023.[18]
On 25 April 2024, the Chart Pattana Kla Party held the 2024 Annual General Meeting to elect the Party Executive Committee for 2 vacant deputy party leader positions. The meeting resolved to elect Wutthipong Thonglao, Prachinburi MP. and Aran Phanthumchinda, former deputy secretary-general of the party is the deputy leader of the party Along with the amendment of the party regulations, the party name was changed back to Chart Pattana Party Including changing the party logo.[19]
