CNN anchors Don Lemon and Kaitlan Collins had a heated exchange during a live broadcast of "CNN This Morning," causing Collins to run off the set in tears, according to sources. The incident was so intense that CNN boss Chris Licht reportedly asked Lemon to take the following day off to "cool off." The three co-hosts have since been seen arriving at events separately and appear to avoid each other. Collins has been spending more time in DC, while Lemon has been told to share the stage more with his co-hosts. "CNN This Morning" has been struggling in ratings, with its lowest viewership since launch last month.