The head of Greece's centrist To Potami party said on Friday the country should go to elections as soon as possible, saying it was impossible for any party to form a government at the moment without outgoing Prime Minister Alexis Tsipras at the helm. "To Potami wants to govern, it has plans for the day after," party leader Stavros Theodorakis told a news conference. "Any efforts by To Potami for a broader government of cooperation will be continuous, but without overlooking the reality of election results." Under Greece's constitution, the three biggest parties in parliament are given a three-day mandate to form a government following the resignation of Alexis Tsipras as prime minister on Thursday night.