Austrian Finance Minister Maria Fekter said Tuesday that any changes to the bailout deal would be "an adaptation of a pragmatic nature" after debt inspectors from major creditors visit Athens.
Separately, a European Union official said the terms of Greece's bailout will be renegotiated because worsening economic conditions have made the old agreement an "illusion."
The official, who spoke on condition of anonymity, citing policy, said the goals of the agreement would still be to reduce Greece's debt and reform its economy to make it competitive. But how they are achieved would be up for discussion, the official said.
Samaras' three-day mandate to form a government expires Wednesday night. If it fails, Syriza would get a chance to form a government, followed by the Socialists. But Tsipras has said he will pass on the mandate and not even try to form a government. Venizelos has advocated circumventing the entire process and proceeding straight to a meeting of party leaders under President Karolos Papoulias.
Setting apart their bitter rivalry stemming from four decades of what was effectively a two-party system, New Democracy and PASOK took part in a brief coalition government earlier this year.
Menelaos Hadjicostis, Demetris Nellas and Jeff Schaeffer in Athens, Sarah DiLorenzo in Brussels and Geir Moulson in Berlin contributed.
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