NATO leaders are gathered in Madrid for the most consequential meeting in the organization’s history. The summit kicked off by enlarging the alliance, giving Putin more NATO, not less: when Sweden and Finland become NATO member states, it will lengthen Russia’s border with the alliance by 800 miles. NATO Secretary General Jens Stoltenberg says this move proves Putin is failing – but danger remains as Russian forces continue to dominate in eastern Ukraine. Christiane discusses all this and more with Swedish Prime Minister Magdalena Andersson.  Also on today's show: Spanish Prime Minister Pedro Sánchez; author Jason Stanley (How Fascism Works).To learn more about how CNN protects listener privacy, visit cnn.com/privacy