Biden left Europe in a jubilant mood, fresh off essentially welcoming Sweden into the alliance and displaying transatlantic unity that is deeply personal to the president. A day earlier, in the week’s centerpiece speech from the NATO summit in Lithuania, Biden defended his policies and rallied democracies to keep up the fight against tyranny in Ukraine and around the world. And he was able to help ease concerns from Ukrainian President Volodymyr Zelenskyy, who over the course of the Vilnius summit appeared to abandon his fury that NATO was slow-walking his country’s admission to the alliance.