President Trump has confirmed his intention to use Florida Rep (Daytona) Mike Waltz as National Security Advisor.
[Source]
Mike Waltz serves on the House Permanent Select Committee on Intelligence (HPSCI).
In the role of Nat Sec Advisor, Waltz would presumably represent the power of the president toward every element of the National Security apparatus and Intelligence Community.
The Nat Sec Advisor is a very powerful position, if used correctly. The absolute power of the President toward the intelligence community in the executive branch is carried by the Nat Sec Advisor (NSA). The NSA has the ability to reach into every silo and control every element of every decision therein.
The NSA organizes the finding memos which authorize all covert intelligence operations globally and domestically. The NSA can shut down bad things in the IC, cancel black-op operations, and essentially hold omnipotent power within the executive branch over every aspect of the 17 intelligence agencies who operate therein. The NSA can also determine what is, and what is not, a national security matter.






