Greek-American Entrepreneur Kasselakis Stuns Greece by Winning Syriza Party Leadership
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Stefanos Kasselakis, a political outsider, wins race to lead Greece's leftwing Syriza party with 56.69% of vote.
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Kasselakis, a Greek-American entrepreneur, ran after party's longtime leader Alexis Tsipras stepped down following election losses.
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Victory described as stunning and unprecedented for someone with no political experience in Greece.
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Kasselakis signals he will bring major changes to Syriza, wants to transform it into a big tent party.
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Some in Syriza fear Kasselakis will move party to the center, ending its leftwing orientation.