Bangkok, July 3, 2025 (AFP) - Thailand’s king is scheduled Thursday to swear in a new cabinet in a reshuffle that will see a third person in a week take on the role as the country’s prime minister.

The Southeast Asian nation’s top office was plunged into turmoil on Tuesday when the Constitutional Court suspended Prime Minister Paetongtarn Shinawatra pending an ethics probe which could take months.

Power passed to transport minister and deputy prime minister Suriya Jungrungreangkit who took office for only one full day, as the bombshell was dropped in an awkward interim ahead of the reshuffle.

When former defense minister Phumtham Wechayachai is sworn into his new position as interior minister he will also take on a deputy prime minister role outranking Suriya’s — thus becoming the acting premier.

Before Paetongtarn was ousted she assigned herself the role of culture minister in the new cabinet, meaning she is set to keep a perch in the upper echelons of power.

She arrived at the Government House on Thursday morning for a group portrait before heading to the Grand Palace to meet King Maha Vajiralongkorn for the closed-door oath-taking.

The newly-appointed cabinet is set to hold its first meeting Thursday afternoon, with a royal statement expected in the evening.

The revolving door of leadership comes as the kingdom is battling to revive a spluttering economy and secure a US trade deal averting President Donald Trump’s looming threat of a 36 percent tariff.

Phumtham is considered a loyal lieutenant to the suspended Paetongtarn and her father Thaksin Shinawatra, the powerful patriarch of a dynasty which has dominated Thai 21st-century politics.

Thaksin-linked parties have been jousting with the pro-military, pro-conservative establishment since the early 2000s, but analysts say the family’s political brand has now entered decline.

The 71-year-old Phumtham earned the nickname “Big Comrade” for his association with a left-wing youth movement of the 1970s, but transitioned to politics through a role in Thaksin’s telecoms empire.

In previous cabinets he held the defense and commerce portfolios, and spent a spell as acting prime minister after a crisis engulfed the top office last year.

Paetongtarn has been hobbled over a longstanding territorial dispute between Thailand and Cambodia, which boiled over into cross-border clashes in May, killing one Cambodian soldier.

When she made a diplomatic call to Cambodian ex-leader Hun Sen, she called him “uncle” and referred to a Thai military commander as her “opponent,” according to a leaked recording causing widespread backlash.

A conservative party abandoned her ruling coalition — sparking the cabinet reshuffle — accusing her of kowtowing to Cambodia and undermining the military.

The Constitutional Court said there was “sufficient cause to suspect” Paetongtarn breached ministerial ethics in the diplomatic spat.