A proposal by SYRIZA, Greece's main left-wing opposition party, to establish a committee charged with investigating the debt-hit country's signing of the bailout deals with the EU and the IMF was being discussed in the Greek Parliament on Thursday.
Greek lawmakers were expected to vote on the proposal around 5 p.m.
Panos Kammenos, who is leader of the nationalist Independent Greeks party, on Thursday said his deputies would support the proposal.
The vote comes a day after an opinion poll by VPRC for Epikaira magazine showed SYRIZA party building a lead over its political rivals. SYRIZA garnered 31.5 percent, New Democracy 26.5 percent and Golden Dawn 12.5 percent. The two other parties in the coalition, PASOK and Democratic Left, gathered just 5 and 5.5 percent respectively.
A Marc poll for Alpha TV on Tuesday night suggested support for SYRIZA was at 29 percent, compared to 26.2 percent for New Democracy.
In a fresh attack on Antonis Samaras on Thursday, SYRIZA criticized the Greek premier of giving in to the demands of Greece's international creditors.
“His total support for the memorandum, his surrender to [Greece's] lenders and the country's absence from all discussion on Europe's ongoing developments are the three pillars of [the country's] strategic defeat and subjugation,” a party statement said.