Trump denied when confronted by Cruz that he stated in a previous debate that single-payer works well in Canada and Scotland - and Cruz followed-up and Trump denied it again. That was not true: https://www.youtube.com/watch?v=jArKSaFRO14
Anderson Cooper also did not interrupt when he said “I like the mandate.” https://www.youtube.com/watch?v=fIDi2wlgZN4 There was no interruption. Trump continued to speak after saying this for a period of time before Cooper said another word. Trump also trumpeted the old leftist playbook that Republicans want people dying in the streets without healthcare, declaring his view to be “unRepublican” that he doesn’t want people dying in the street.