By Sunday, May 25, approximately 400 million European Union citizens across 28 countries will have had the chance to go to the polls to elect a new parliament in Brussels. Farther east, Ukrainians will select a new president on the same day. There are no overlapping candidates, constituencies or, on the surface, issues in these two distinct elections. In fact, voting may not even take place in much of Ukraine. But the two polls, taking place simultaneously from Donetsk to the Canary Islands, are closely interconnected: Much about the future of Europe hinges on their outcomes.