WATCH: Pence aide reveals she was ordered to spy on Dr. Birx

Former Mike Pence aide Olivia Troye revealed she was ordered to spy on Dr. Deborah Birx during a Monday night interview on MSNBC."I was told I that I was to watch her," Troye told Chris Hayes. "That she was not to be trusted because she was a Matt Pottinger hire.""And so here I am as a Homeland [Sec...