Tamil Nadu will vote on Thursday for 38 of its 39 Lok Sabha seats after election to the Vellore seat was cancelled due to seizure of Rs. 11.6 crores from the godown of a DMK functionary on April 1. But more importantly, voters in 18 Assembly constituencies will also elect their MLAs which would have a bearing on the survival of the Edappadi K. Palaniswami government.