What we hope to learn from Robert Mueller's investigation
President Donald Trump at speaking at the 2017 Conservative Political Action Conference in February.
Flickr Photo/Gage Skidmore (CC BY SA 2.0)/https://flic.kr/p/SfGqf1
Bill Radke talks to Phil Ewing, NPR's National Security editor, about the latest in the investigation into the Trump campaign's connections to Russia in the 2016 election.
