Greek president holds last-ditch government talks NEW: The results of a new election would be much like the last one, a poll says President Karolos Papoulias warns that "things in Greece are quite difficult" He is meeting with all party leaders on Sunday The three top-placed parties in last Sunday's election have each failed to form a coalition Athens, Greece (CNN) -- Greek President Karolos Papoulias is holding last-ditch talks with political party leaders Sunday, a week after elections where angry voters punished mainstream parties by backing a range of fringe groups. The leaders of the three biggest parties in the incoming parliament have all tried and failed in the last week to come up with a governing coalition. Antonis Samaris, the leader of the center-right New Democracy party, said Sunday that the voters had called for collaboration, change, and staying within the eurozone, the group of 17 European countries that use a common currency. Europe is keeping a nervous eye on Greece, fearing that the political chaos there could lead to defaults on debt that could threaten the future of the euro. Greek failure -- or refusal -- to make debt payments could hurt banks across Europe. Papoulias is meeting Samaris along with the leaders of the radical leftist Syriza coalition, and the mainstream Socialist PASOK party on Sunday. He'll hold talks with the leaders of smaller parties later in the day. Independent Greek Party leader Panos Kammenos complained about the way Papoulias was organizing the meetings, saying all party leaders should meet together. The Communist party, meanwhile, called for new elections, saying they will not participate in a coalition government. If no government can be cobbled together by May 17, new elections must be called. Four out of five voters said they would vote the same way in a new election, according to a poll published Saturday by the newspaper Kathimerini. Three out of five said they believed new elections would be held soon, and just over half said they were not happy with the results of the vote on May 6. In a separate poll published Sunday by the newspaper Vima, seven out of 10 people said they wanted the parties to form a coalition government. Syriza would come top if new elections were held, the Vima poll suggested, after coming in second behind New Democracy a week ago. But the results would still lead to a deeply divided parliament, the poll suggested, with no party getting more than 21% of the vote. In the same poll, six out of 10 voters said Syriza's plans were not realistic. Its leader Alexis Tsipras made a radical speech last week against austerity. Evangelos Venizelos, leader of PASOK, met the president Saturday after he became the third politician to fail to form a coalition. But this could still be problematic as the Democratic Left has previously said it will only join a coalition if Syriza also joined. Severe austerity measures are required under the terms of the bailout, agreed to by the outgoing coalition government of PASOK and New Democracy. A poll last week suggested that if new elections are held, Syriza would come first with 28% of the vote, although without achieving a majority. Syriza came in second in last week's election with 16.8%. The party is opposed to the terms of the bailout agreed with the European Union, European Central Bank and International Monetary Fund. But last week's election results were widely seen as a message to politicians to back away from the economic measures, which include policies to cut spending and raise taxes to reduce public debts. CNN's Antonia Mortensen and Journalist Elinda Labropoulou contributed to this report.