Richard Cohen says anxiety about next month 's poll results extends beyond Greece . The rise of the left wing political grouping and its leader Alexis Tsipras has rattled the country . But Ehrman says Tsipras has been alone in finding out the truth on the euro . Ehrman : If the referendum is held as a referendum it will define whether the eurozone survives .
Richard Ehrman says anxiety about next month 's poll results extends beyond Greece . The rise of the left wing Syriza grouping and its leader Alexis Tsipras has rattled the markets . But Ehrman says Tsipras has been alone in spelling out the truth on the euro . Ehrman : If the election is treated as a referendum it could define whether the eurozone survives .