From a Washington Post column by David Ignatius headlined “Amid promising signs in Ukraine, uncertainties abound”:

President Biden on Monday heads to a NATO summit in Vilnius, Lithuania, in what seems an enviable position: The alliance is stronger than ever before; its ally Ukraine is slowly advancing on the battlefield and receiving more weapons every week; and Russia is in disarray at home.

Yet if the Ukraine war is going so well for Biden and the West, why does it still feel so fraught with danger — and why is its eventual outcome still so uncertain? That’s the paradox that should haunt the allies as they gather in the Lithuanian capital: Can they move from a strategy of sustaining Kyiv to one for victory?