European Union officials appealed to French voters Saturday to vote in favor of the EU constitution in a May 29 referendum, and said a rejection would derail European integration. Luxembourg's Foreign Minister Jean Asselborn, whose country holds the EU's rotating presidency, urged French voters to think of the EU as a whole when they vote on the 25-nation bloc's landmark document. The EU constitution, which aims to simplify procedures and decision-making in the EU after the bloc gained 10 new members last year, must be ratified by all EU countries to come into effect. Rejection by any one member would stop the document in its tracks.