President Volodymyr Zelensky of Ukraine unexpectedly traveled to the Netherlands on Wednesday and was scheduled to speak in The Hague on Thursday, according to the Dutch wire service ANP. Mr. Zelensky made the trip after spending much of Wednesday denying Russian claims his country was responsible for an early morning drone attack on the Kremlin, saying that Ukraine was focused on the fight on its own soil. “We’re defending our villages and cities,” he said, while visiting Nordic leaders in Helsinki, Finland. In the Netherlands, Mr. Zelensky was also expected to meet with Prime Minister Mark Rutte and to visit...