Who would a POTUS turn to if a corrupt cabal of high level members of the US DoJ, FBI, CIA, and Legislators tried to assassinate you?

What type of power would a POTUS use?

Would an EO be signed and invoke certain powers right after to weed out and track down everyone knowingly involved?

How long would it take to track down everyone involved?

What would happen when arrests are ready to be made.

Who would prosecute the traitors?

When would the hammer fall?