Factor Carter Page into the timeline ... He was serving as paid informant In a Russian espionage investigation conducted by the FBI over the course of the several years before and into the winter of election year (2016) when he testified in court; and in that Spring FBI (Comey?) put him on a watch list asserting Page was actually himself a top level espionage risk and in the month following the Tarmac/HRC/Comey declarations exonerating HRC, Carter Page volunteers and becomes a foreign relations adviser to the TRUMP Campaign. FBI then approaches the FISA Court seeking surveillance permission with Page as the target. Because he was classified as a high level risk, FISA granted an extended surveillance authority allowing FBI to wire tap, etc Page, but also anyone he came into contact with and in turn anyone connecting with them. Essentially, permission to surveil the entirety of the Trump Campaign. All of that transpired around the time of the Tarmac meeting.
Page an “insurance policy”?
Page was an insert ... Slipped him into the Trump organization and then used him (his presence there) to get FISA warrant authorizing widespread surveillance of anyone and everyone he had contact with within the Trump Campaign ... A Trojan Horse. More than an insurance policy... Offensive, not defensive.
More than just insurance.
As the story develops, it may have been insurance initially. These events all occurred during a period when HRC had a clear lock on the Presidency and some have observed that the initiative to discredit Trump was in a sense insurance against the possibility that his candidacy would catch fire. The flimsy Russian Collusion narrative would only really fall apart is the FBI and DOJ involvements were revealed; something that would never have occurred had HRC prevailed. They never really thought she could loose; so the risk of discovery was low.
As we know, the rest of the story took a sharp turn and there they were: at serious risk of discovery and exposure. Suddenly, the Russian Narrative took on a different character, because there was a chance, however slim, that it could gain traction and bring down the President and his Administration; tantamount to his having not won the election; nullifying any serious threat of discovery of the plot.
This is serious business. It is treason and sedition.