The size of the French No vote has delivered a shock to the European Union and its political class. But it would be wrong to assume it marks the imminent end of Europe's constitutional treaty.Defeated in one of the biggest referendum turnouts, Jacques Chirac hinted he could replace Jean-Pierre Raffarin, who told Chirac to expect unspecified political developments. In a turnout of 69.7%, many voters used the vote to punish Chirac and his government over France's economy and high unemployment. Chirac promised to change but refused to step down. The EU charter requires the backing of all member states to become valid. EU leaders insisted the treaty was alive but acknowledged the French result hit its chances elsewhere in the 25-nation bloc. Analysts picked over the reasons for the resounding defeat of the "Yes" camp on Monday, with wide agreement that a key factor was anger at unemployment, now at a 5-year high of 10.2%, and at Chirac's unpopular economic reforms. Some said the "No" camp had captured public concern about France's declining role in an EU of 25 countries to argue the constitution would mean a loss of sovereignty and a shift of more powers to Brussels.