i guarantee you there has been a deep state running the US for quite a while and presidents have gradually lost their power over time because of that, with that effect especially being pronounced in the mid 20th century, i believe that itself has been a thing since as early as the 50s or 60s and was motivated because of presidents like woodrow Wilson who advocated for increased government intervention in the economy, leading to corporations starting to be involved with the us government therefore creating the revolving door
https://en.wikipedia.org/wiki/Revolving_door_(politics)