BANGKOK--Thailand's King Maha Vajiralongkorn on Friday moved to block his elder sister's surprise bid to run for prime minister in March, calling her candidacy for a populist opposition party "inappropriate" and unconstitutional.
Princess Ubolratana Rajakanya Sirivadhana Barnavadi, 67, stunned the nation when she announced on Friday she would be the sole prime ministerial candidate for the party, which is loyal to ousted ex-premier Thaksin Shinawatra, in the March election.
Her candidacy instantly threatened to upend the first national ballot since a military coup in 2014 that ousted a government loyal to Thaksin, the figure at the centre of years of political turbulence and rival street protests that have riven Thai society. But her foray into politics looked to be short-lived after the public opposition from King Vajiralongkorn, which is likely to lead to the Election Commission disqualifying her or the princess dropping out of the race.
Thailand has been a constitutional monarchy since 1932, but the royal family has wielded great influence and commands the devotion of millions. "Involvement of a high-ranking member of the royal family in politics, in whatever way, is an act that conflicts with the country's traditions, customs, and culture, and therefore considered highly inappropriate," the king said in a statement.
The statement was issued by the palace and later read on air by a television announcer.
King Vajiralongkorn also cited a provision in the constitution that states the monarch stays above politics and maintains political neutrality. "All royal family members adhere to the same principles ... and cannot take any political office, because it contradicts the intention of the constitution."
Friday was the last day for parties to declare candidates. The Election Commission declined to comment when contacted by Reuters late on Friday night, with an official saying its members will hold a meeting on Monday.
The princess's nominating party, Thai Raksa Chart - an offshoot of the larger pro-Thaksin party that was ousted from power in the 2014 coup - could not be reached for comment. Prime Minister Prayuth Chan-ocha, who was army chief when he led the 2014 coup and now heads the ruling junta, also announced his candidacy on Friday.
Ubolratana, who has starred in Thai soap operas and a movie, relinquished most of her royal titles in 1972 when she married an American, a fellow student at the Massachusetts Institute of Technology (MIT), Peter Jensen. She lived in the United States for more than 26 years before they divorced in 1998.