The question is has he been brainwashed, has he been bought or is he being blackmailed?
To which the answer is "Yes!"
When recruiting an 'asset' (as the movies and all the 'Walters' like to call them nowadays) you give them some moral justification, you give them some money and you use that to blackmail them if they look as if they might be about to back out of the deal.
Let's say that you want to recruit a junior officer in the military. He has a minor weakness, let's say he's bisexual - so you get some footage of him (drunk) kissing a good-looking guy who is working for you. Great! That's your 'in' and you are going to use that. That could have been on R&R in Bangkok or in a gay bar in London - anything will do!
Years pass and he gets to be a lieutenant colonel. Great! That means he is at battalion commander level and gets to read all the latest security and policy briefings. Now you get another (or even the same) guy or girl to meet our target. A few drinky-poos and some mild flirting and our 'agent' brings the conversation around to all the wind-swept and groovey things he has done over the years.
Guys like to talk. They are notoriously gabby and like to "give it large" when the old dangly bits start to stir. Our agent asks for a favour - some totally unclassified document like a workshop manual to a gearbox for a Bedforsd three-tonner. Rubbish you could find on the internet.
He hands it over - and because he is stupid, he hands over a military copy that has the word 'RESTRICTED' top and bottom of every page. He has now broken several laws and you have filmed him doing it (and being paid for it each time!) You also have film of him fornacating and that could damage him privately!
Now you escalate all the way up to handing over stuff with the magic words 'TOP SECRET' at the top and bottom. That's real stuff with a distribution list with his stupid name on it! And every one of his 'indiscretions' filmed and documented! And of course, every payment directly traceable back to you, should you wish to make them public.
The fish is completely hooked.
Trump? Maybe. Who knows? I would test him.
Give the idiot some massive intel via GCHQ. A huge bomb planted in the sewers under St. Peterberg, due to go off next Sunday. A second front to be opened up on the other side of Crimea. A secret undercover army to attack an ammo-dump on a given date. Whatever! Something that will get a massive reaction from the other side.
If they react, you have a known traitor and they are incredibly valuable. A useful idiot that gives you a feedback loop to the enemy! That's when the real fun begins!
