Sentence:  In a thread called “Calm Before the Storm”, and in subsequent posts, Q established his legend as a government <WSD>insider</WSD> with top security clearance who knew the truth about a secret struggle for power involving Donald Trump, the “deep state”, Robert Mueller, the Clintons, pedophile rings, and other stuff. 
Meaning of the word marked with <WSD> tags:  A person who has special knowledge about the inner workings of a group, organization, or institution.