Six months ago the chances that Britain would leave the European Union-Brexit-were remote. Today, largely because of Europe's migration crisis and the interminable euro mess, the polls have narrowed. Some recent surveys even find a majority of Britons wanting to get out. David Cameron is partly responsible, too. Fresh from his election victory, the prime minister has embarked on a renegotiation to fix what he says is wrong with the EU and is committed to holding an in/out referendum by the end of 2017. But Mr Cameron is in a bind. It is fanciful to believe that the small changes he may secure will convert those who instinctively favour Brexit. And yet he can hardly argue that the eu is just fine as it is-otherwise his renegotiation would be needless.
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