Russia is stuck on the Ukrainian battlefield and lashing out with massive strikes on Kyiv. The growing fear in European capitals is that President Vladimir Putin will try next to reshuffle the cards by expanding the conflict to Europe. In recent weeks, Russia has made increasingly bellicose statements against the Baltic states. It has threatened to bomb “decision-making centers” in Latvia after accusing the country of hosting Ukrainian drone operators, an allegation denied by the Latvian authorities. Air-raid alarms were sounded in Lithuania last week, forcing the government into a bunker, after suspected Russian drones approached its airspace from Belarus....