Move Forward Party, the surprise winner in Thailand’s May election, ruled out support to a coalition-led by Pheu Thai Party and its prime minister nominee Srettha Thavisin.

The decision to not back the Pheu Thai-led coalition is unanimous and taken by Move Forward lawmakers at a meeting on Tuesday, party Secretary-General Chaithawat Tulathon told a briefing.

Voting against Srettha risks pushing Pheu Thai toward conservative adversaries and pro-royalist senators, who thwarted Move Forward’s efforts to form a government under Pita Limjaroenrat.

--With assistance from Pathom Sangwongwanich.