In the run-up to the 2023 general election, then Prime Minister Prayut Chan-o-cha joined the party on 9 January 2023 as its candidate for the position.

[9] There is the first party office at 169/98 Serm Sub Building Ratchadapisek Rd., Ratchadaphisek Subdistrict, Din Daeng District, Bangkok.

In the 2023 election, there had been talks with Prawit Wongsuwon, Deputy Prime Minister and leader of the Palang Pracharath Party.

[20] Prayut gave an interview to reporters on 3 January 2023, stating that he would definitely apply for membership in the United Thai Nation Party, but had not yet set a clear date.

[22] The next day, there was news that Prayut was preparing to apply for a party membership at the launch event conference on Monday, 9 January 2023 at the Queen Sirikit National Convention Center.