It’s one of his fifteen or sixteen favorite verbal ticks.
The media use it as a means of discrediting him. His most ardent supporters treat it as a gospel.
I’m going to blow everyone’s mind here. Do you know those stories preachers tell about the friend who lost his job or lost his wife or had a sick child?
You can buy those stories in a book or find them online. Preachers don’t actually know ten thousand people who experience horrible tragedies.
https://storiesforpreaching.com/
Same with Trump. He’s not getting calls at all hours praising whatever topic is discussing at the moment.
I used to work for a Public Affairs officer in the Army. He got two or three monthly newsletters full of clever sayings and illustrative anecdotes to use in speeches.