BANGKOK (AP) — Residents of the Thai capital, Bangkok, will cast their ballots for the city’s leader Sunday in a vote seen as a barometer of the public mood ahead of an approaching general election.

Opinion polls suggest that candidates associated with opposition parties in Parliament will dominate in the race, while the incumbent, who is seen as the ruling party’s choice, trails behind.

Bangkok, the country’s biggest city, is legally a province and the only one where residents can choose their own governor. The position elsewhere is appointed by the Interior Ministry. It has been nine years since the last election, and voters' choice last time was replaced in 2016 by an appointee of the military government then leading Thailand.

Thai politics since a 2006 coup has been generally polarized between pro- and anti-military parties, and the top candidates reflect that schism.

The frontrunner in the polls, Chadchart Sittipunt, is running as an independent. But both his supporters and opponents see him as a proxy for the main opposition party, Pheu Thai, for which he stood as a prime ministerial candidate in the 2019 general election. He served as transport minister in a Pheu Thai government from 2012 to 2014.

“You need a governor for the people: people-centric, you know, respond to their day-to-day problems, improve their day-to-day problems, that’s one thing,” the 55-year-old Chadchart told The Associated Press as he campaigned recently in a market. “Also you need the governor who has a vision, who has the strategy to bring the city to the future, so you need two jobs.”

A record-high 31 candidates entered the race, but Chadchart's performance against one candidate in particular is drawing special scrutiny.

Asawin Kwanmuang was appointed governor in 2016 by Prayuth Chan-ocha, the former general who seized power in the 2014 coup and was returned to office following the 2019 election as Thailand's prime minister.

Like Chadchart, the former senior policeman says he is standing as an independent, though he is very much seen as the government’s candidate, a stand-in for the ruling Palang Pracharath party.

“I urge (people) to vote for the ‘Love Bangkok’ team. Our team isn’t linked to any political party. Our team truly wants to develop Bangkok to be a better city,” he told reporters at a campaign rally last week.

A third candidate whose results will be carefully watched is Wiroj Lakkhanaadisorn from the opposition Move Forward Party. His party takes a more critical stance than Pheu Thai toward the government, but for that reason could siphon votes from Chadchart's total, to Asawin’s benefit.

The candidates are campaigning on local issues: congestion, pollution, persistent flooding and others. But the poll will likely be influenced as much by its timing as its issues.

Prime Minister Prayuth has been in power for eight years. He is expected soon to face a no-confidence motion in Parliament, and rivals on his own side have long been rumored to be seeking to remove him. Even if he survives, there must be a general election by the early part of next year.

Prayuth was able to rule by decree as head of a military government but has struggled with the limits of parliamentary democracy, taking fire especially for fumbling Thailand’s coronavirus vaccination program and recovery plan.

“People are fed up. They’re fed up because the economy is going nowhere, there’s no vision ahead,” said political science professor Thitinan Pongsudhirak of Bangkok’s Chulalongkorn University.

“There’s no future, that’s why young people are protesting. General Prayuth is way out of his league so I think we will see the voters saying something here for the Bangkok governor’s election and that will be a harbinger, a sign of things to come for the broader polls for Thailand."

Associated Press video journalist Tassanee Vejpongsa contributed to this story.