Europe Hurts if Britain Goes. It's Worse if Britain Stays.

U.K. polls have swung toward an "in" vote since the murder of parliament member Jo Cox, a predictable shift toward stability. It may be time to switch from imagining post-Brexit dystopias to picturing a Europe with the U.K. still in it. That's almost an equally worrying sight, given what some of the EU's top officials and former architects say about European integration these days.

You'd never expect euroskepticism from Valery Giscard d'Estaing, the former French president who, in the early 2000s, watched over the drafting of a European Constitution, which was approved by EU heads of state in 2004 and even by some countries' voters, but killed after France and the Netherlands rejected it in referendums in 2005. The EU's current framework, the Treaty of Lisbon -- whose Article 50 would have served as the legal basis for Brexit -- is in part based on that strong federalist document. Yet Giscard now says the EU-28 is "ungovernable."