The resignation of Jurin Laksanawisit as Democrat Party leader could see the return of former premier Abhisit Vejjajiva to lead the country's oldest party, according to a Democrat source.
Before the election, Mr Jurin set a minimum target of capturing 25 seats but the party's inability to hit that target on Sunday led to his decision to relinquish the party leadership.
As of 5pm on Monday, when the vote count by the Election Commission was at 99%, the Democrats had won 22 MP seats in the constituencies, but it was edging close to grabbing three more seats from the list system.