Covert governmental networks operating independently of public state political leadership
A deep state is a type of government made up of potentially secret and unauthorized networks of power operating independently of a state's political leadership in pursuit of their own agenda and goals. In popular usage, the term carries overwhelmingly negative connotations and is often associated with conspiracy theories. Etymology and original usage. "Deep state" is a calque of the Turkish word derin devlet (lit. 'deep state').
https://en.wikipedia.org/wiki/Deep_state