Open this photo in gallery: From left, Federal Chairman of the CDU Friedrich Merz, CSU lead candidate for the European elections Manfred Weber, President of the European Commission and EU and EPP lead candidate Ursula von der Leyen, and Chairman of the CSU and Minister President of Bavaria Markus Soeder take part in the CDU and CSU closing rally for the European elections in the Lowenbraukeller, in Munich on June 7.Sven Hoppe/The Associated Press It’s easy to get overwhelmed by the EU elections. Voters cast ballots in two dozen languages in 27 countries with scores of different campaign issues. So...