
PPP leader Samak Sundaravej has withdrawn from the process.
Pongthep, a spokesman of former prime minister Thaksin Shinawatra, said the former Thai Rak Thai executives had been invited to analyse the political situation because they were close to PPP leaders.
Caretaker Agriculture Minister Theerachai Saenkaew disagreed with a PPP proposal to grant amnesty for the 111 Thai Rak Thai executives.
He said as long as the People's Alliance for Democracy continued to protest, an amnesty would cause "endless problems".