The results of the weekend’s European Parliament elections may not have been entirely surprising, but they’re a shock to Europe’s system nonetheless. So-called euroskeptic parties notched their best results to date in Continent-wide polls. This doesn’t mean Europeans don’t want the European Union, but it does signify they want an EU that serves them better. Voters across the 27-country bloc elected 720 members of the European Parliament. Votes still were being tallied as we published, but it...