European elections: Far-right victory divides France
26 May 2014 Last updated at 22:54 BST
French President Francois Hollande has said the EU must reform and scale back its power, amid a surge in support for Eurosceptic and far-right parties.
The National Front stormed to victory in France with a preliminary 25% of the vote, pushing Mr Hollande's Socialists into third place.
Gavin Hewitt reports from Paris.