A war-weary Ukrainian President Volodymyr Zelensky spoke to a joint meeting of Congress today, calling on the US to do more to protect his country. CNN Political Director David Chalian explains how President Joe Biden and US lawmakers reacted and how far they’re willing to go, for now, to give Ukraine what it’s requesting. Biden also announced new security assistance for Ukraine, defending the US & its allies’ response so far.To learn more about how CNN protects listener privacy, visit cnn.com/privacy