Greek conservative leader Antonis Samaras said Monday he was unable to form a coalition government with other parties, according to dpa. Despite winning the most votes in parliamentary elections on Sunday he said that efforts to form a coalition government had failed, raising the possibility of a new election next month. He handed the mandate to form a government back to the country's president, who is scheduled to pass it to the second-placed Coalition of the Radical Left, Syriza, to try to form a coalition on Tuesday.