Kayla Epstein explains the chaotic, confusing, bizarre process that is the Iowa caucuses. And political reporter Aaron Blake tells us how the GOP succeeded in blocking witnesses in the Senate impeachment trial.

The new targets of Trump’s travel ban

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.