Matt Zapotosky with a preview for Attorney General William P. Barr’s Mueller report testimony before Congress. Manuel Roig-Franzia on Lou Dobbs’s influence on President Trump. Plus, Samantha Schmidt on the ride service for K-12th-graders.

U.S. agencies want to 'Russia-proof' 2020. The White House isn't on board.

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.