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 [Security] advisor saying, 'you're asking me to spy on this woman that I'm sharing an office with, who is on our team when we know this pandemic is out of control we know that people are going to get hurt and this is where the focus is?'" she explained.