the sleep number 360 smart bed is on sale now. only from sleep number. welcome to "the lead." this hour an olympic fortress, taking a close look at how china is trying to keep thousands of elite athletes free from covid in one of the most densely populated cities in the entire world. plus, building back in pieces. president biden says he is willing to break up his massive $1.8 trillion build back better bill into smaller chunks. are progressives onboard? we'll ask the chair of the house progressive caucus. and leading this hour, that's not what he meant. the white house and the president himself trying to clean up comments yesterday in which he appeared to give russian president vladimir putin the green light after what biden called a, quote, minor incursion into ukraine. the president clarifying today or attempting to do so, saying