We're not talking about DC lobbyists, who have little to no access to the very innermost intelligence data and secretive workings of our government. We're talking about one of the most senior members of Congress.
He had access to a wide range of high level intrigue and data, that even the deep state Ministry of Propaganda has little to no clue of.
Sessions, like all US Senators, was chest deep in the muck and mire of the Swamp, and knows all too well where the bodies are buried.
His fellow scum sucking denizens know that he knows, and have ample evidence of those facts, which they would be only too happy to divulge, should Sleepy ever step out of line.
Some DC lobbyists are former members and still hold security clearances. Some of them know more than current members because they have time to focus.
Sessions was senior, yes, but Cochran even more senior, and Cochran is more suited to a geriatric farm. Members do not necessarily know all they need to know else many would not be holding hearings trying to get information past a stonewall.
Sessions job was to represent constituents and commerce interests of Alabamans. He did a fine job. But on matters of international policy and of deep state shenanigans, he went along with McConnell’s lead. And McConnell likely didn’t know of deep state traitors like McCabe, Strzok, Page, Simpson, and many others.
Members do not know everything, they are not informed of everything, they are often told issues of ‘national security’ bar them from being fully briefed, and they do not pry into the deep state unless a large faction of their constituents or their colleagues in Congress or VIP lobbyists or well-known operatives move them to do so. Members are usually ‘reactive’ to events, not on top of them.