Short Profile of Alexis Tsipras, who on Thursday said he will step down as leader of Greece's left-wing Syriza opposition party following a crushing defeat at the polls. Voters handed New Democracy leader Kyriakos Mitsotakis an imposing election victory for the second time in five weeks on Sunday -- while Syriza saw a loss of tens of thousands of voters in just weeks. "There are times when crucial decisions have to be taken," an emotional Tsipras told the press in Athens, saying he would call "elections within Syriza for a new leader, in which I will not be a candidate". SHORT PROFILE OF