According to the source, the incident resurfaces his long-held belief there are individuals inside his administration -- especially in the national security realm -- who are actively working to undermine him.
1. President Trump needs to accept the fact that a significant portion of the Deep State is actively engaged in treason, opposing him even when his decisions are well within the discretion of the President of the United States. He should assume everything will leak.
2. President Trump needs a team working on tracking down these traitors, gathering evidence, and either prosecuting or firing them. The FBI won’t do it, but I’ll bet he could find a private security firm that would get the evidence he needs.