Katie Couric is opening up about her complicated feelings when it comes to her former show co-host, Matt Lauer, and the sexual misconduct allegations against him.Couric appeared on the show on Tuesday to promote her new memoir, , and talked to the morning show's co-host, Savannah Guthrie. Couric and Guthrie both co-hosted with Lauer on the show before he was fired in November 2017, after being accused of inappropriate sexual behavior by several co-workers.