The party informed reporters without explanation that Thai Raksa Chart leader Preechaphol Pongpanit and party campaign chief Nattawut Saikaur would cancel the visit to Yaowarat.
The party earlier informed reporters that Preechaphol, Nattawut and several executives would visit Yaowarat to help its two candidates campaign Saturday. The two candidates are ML Nattapol Devakul, running in Constituency 2, and Pongpisut Jitsophon, running in Constituency 3.
The campaign was planned at 4pm to 5.30pm.
On Friday morning, Preechaphol dropped a political bombshell when he submitted the name of Princess Ubolratana Rajakanya Sirivadhana Barnavadi as the party's sole prime minister candidate.
But the plan was shattered some 12 hours later after His Majesty the King issued a televised royal command prohibiting his elder sister from entering politics, saying a member of the Royal Family must be above politics.