There are at least several subplots as to what motivated Flynn to become politically partisan, and what caused the Obama admin, and more importantly, the natl security apparatus to find Flynn was out of bounds.
But the bottom line was Flynn was dirty from taking money for foreign lobbying while not reporting it and THEN coming back into govt. And he was taking money from the same level of Oligarchs that Trump was taking money. So the FBI had him by the shorthairs over the money, but they decided to run him up on perjury so they could squeeze his balls for dirt on Trump and Russia. And then it turned out that Trump was happy and willing to get dirty money for his biz, and he was happy to get any help Putin offered on setting up a digital campaign and hacking Hillary's emails, but he didn't offer Putin anything in return. Which was fine with Putin since his aim was to help divide democratic governments.
Interesting.....
The FBI conducted a thorough, exhaustive investigation of Flynn....and the FBI Agents directly involved in / conducting the investigation declared they found NOTHING illegal or worth continuing the investigation. The FBI itself recommended the case be CLOSED.
During this time, the FBI was paying a KNOWN Trump-hating ex foreign spy who was working for Russian Oligarchs for Russian Intelligence Service (RIS) information they themselves assessed to be RIS propaganda that was being used elsewhere against US Foreign Policy.
During this time, the State Department notified the NSA, CIA, FBI, and DOJ that Steele had LIED in an interview and ceclared he could no longer be considered a trustworthy source of information.
During this time, as mentioned, the FBI assessed the data in the Dossier Steele gave them to be DIC counter-Intel propaganda, propaganda Steele told the FBI at the time he had no clue if it was legit or not ... and the FBI ALREADY knew it was NOT...but chose to use it anyway.
On the verge of closing the investigation of National Security Advisor Flynn , FBI Deputy Director of Counter-Intelligence, Peter Strzok, stepped in and ordered the investigation od Flynn to remain open ... but did not give justification for doing so.
-- A Hand written note asking FBI leadership what the goal of investigating Flynn was - force him to confess / entrap him (?) - was passed up the chain.
Withheld evidence now confirms Strzok stepped in, refusing to allow the investigation that produced nothing to be closed, and charged Flynn with lying to the FBI, despite the Field Agents involved stating they did not believe Flynn ever lied. Strzok then secured the 'Guilty' plea by threatening to put Flynn's son in prison if he refused.
'Flynn was dirty'....
You mean he was so corrupt that her would break laws, violate someone's Constitutional and Civil Rights, lock them in a room without Legal Counsel, and force someone to sign a bogus 'Guilty' plea by threatening to send their kids to prison if they refused?
You mean Flynn was the type of man who would manufacture both a crime and evidence against someone, who would alter official documents multiple times, who would alter witness testimony after the fact, who would hide exculpatory evidence?
You mean Flynn was the type of guy who would create false narrative using known / assessed Russian Intel Service propaganda and would use that false narrative to attempt a soft coup consisting of FISA Court abuses in order to secure illegal warrants to spy on the President and his team in order to remove him from office....
All of which Clapper, Brennan, Rosenstein, Comey, McCabe, Strzok,, Page, Baker, Clinesmith, etc... did?!