Bangkok, Dec. 16 -- The latest opinion survey conducted by Thailand's National Institute of Development Administration (NIDA) shows that 40.6% of respondents said they had yet to identify a suitable prime ministerial candidate, marking the highest level of uncertainty recorded so far this year.

The quarterly poll was conducted nationwide from December 4 to 12, with 2,500 respondents.

Natthaphong Ruengpanyawut, leader of the opposition People's Party (PP), remained the most popular individual candidate with 17.2% support. However, the rate has continued to decline. After peaking at 31.48% in the second quarter, support fell to 22.8% in the third quarter and dropped further in the latest survey, indicating weakening momentum for the oppos...