How a moderate West Virginia Democrat could decide what Biden can do on climate change. Plus, the story of a snowstorm, six expiring vaccines and a group of dedicated health-care workers.

The ex-president’s defense

Post Reports is the daily podcast from The Washington Post. Unparalleled reporting. Expert insight. Clear analysis. Everything you’ve come to expect from the newsroom of The Post, for your ears. Martine Powers and Elahe Izadi are your hosts, asking the questions you didn’t know you wanted answered. Published weekdays around 5 p.m. Eastern time.