When the laws on free movement were conceived, "it was assumed that this would be about highly qualified, multi-lingual, economically mobile work force moving across borders — not about Roma," said Hugo Brady, senior research fellow at the Centre for European Reform. It is tempting for politicians like Mr Sarkozy, whose fortunes are flagging, to play the immigrant card, but that also risks raising public passions, Mr Brady said, possibly undercutting support for European institutions among a public that is already skeptical about integration.