UK PM David Cameron promises to hold a referendum on EU membership by 2015 . Europeans Foreign Minister Barack Obama says Europe can not be `` a la carte '' Germany warns against `` cherry-picking '' saying French are in the same boat . Germany President Barack Obama had told Cameron the U.S. valued the UK 's place in the EU .
UK PM David Cameron promises to hold a referendum on EU membership by 2017 . French Foreign Minister Laurent Fabius says Europe can not be `` a la carte '' Germany warns against `` cherry-picking '' saying Europeans are in the same boat . U.S. President Barack Obama had told Cameron the U.S. valued the UK 's place in the EU .