keywords: referendum socialists socialist eu france
text:  #39;Yes #39; camp claims victory in French Socialists #39; vote on EU &lt;b&gt;...&lt;/b&gt; France #39;s opposition Socialist Party voted in favor of the European Union #39;s new constitution, party leaders said Thursday, boosting the chances of success for a national referendum and drawing jubilant praise from pro-EU forces across the continent.