Engdahl may have accurately put his finger on one major link between the deep state and the Executive branch of the US government.
Biden is clearly an enforcer for a faction of what we might call the permanent establishment, the hidden real government that runs on automatic imperial pilot regardless who is nominal US President. That “permanent establishment” is currently becoming “dis-established” everywhere in the world. It sees with horror that its grip on the entire world is crumbling. It does only what it has always tried in such cases—war, war, war. Only of late, those wars—war against Russia over Ukraine, war against Assad’s Syria, an attempted war against Erdogan in Turkey, a war against the growing economic muscle in the world of China—have been impotent flops. Biden, a dutiful servant of those interests, carries the flag of war to where he is sent, much like the character in Monty Python’s Ministry of Silly Walks.