The US, alongside G7 and EU nations, announced more steps to squeeze Russia's economy even tighter. CNN Political Director David Chalian explains what they are and what they’ll aim to do. As Russian attacks on Ukraine intensify, DC lawmakers and Ukranian officials want the West, especially the US, to act faster to assist Ukraine. But President Joe Biden made two things clear: the US must be in lockstep with its allies on actions and the US will not fight a war against Russian in Ukraine.To learn more about how CNN protects listener privacy, visit cnn.com/privacy