Italy's main center-left party, an amalgam of the former Italian Communist Party and the progressive faction of the Christian Democrats. More than once it lost elections that appeared to be there for the taking. In 2013, Matteo Renzi, 39, won party primaries with a pledge to sweep out the elder cronies. He then became prime minister in February 2014 through a party coup, and the Democratic Party (PD) won nearly 41% of the May 2014 European parliamentary vote. That's the highest-ever for the Italian left, although the low turnout is a caveat. Renzi also made the PD, as it is known, a member of the European Socialist Party federation.