An unseemly split over tanks risks the ironclad unity the NATO alliance has demonstrated in support of Ukraine. Among some allies – led by Britain, Poland, Finland, and the Baltic nations – there is a sense of striking while the iron is hot, before Russia regroups for an expected spring offensive. At the heart of the drama is the German Leopard 2 tank, which is top of Ukraine’s wish list. But the German chancellor is dragging his feet. More than a dozen countries own those tanks, including Poland, which says it will send its Leopards to Ukraine. But it would need Berlin’s sign-off. U.S. National Security Council spokesperson John Kirby joins the show from the White House to discuss what military support Ukraine is getting – and what more the alliance can deliver.  Also on today's show: Marcin Przydacz, Foreign Policy Adviser to Polish president; Delia Ephron, author, Left on Tenth. To learn more about how CNN protects listener privacy, visit cnn.com/privacy