He needs to be consulting a panel of psychologists about how to best manipulate Trump.
The man is old, confused and likes to lash out when he doesn't feel worshipped. I feel like his untreated (but well documented) pathologies leave him quite vulnerable to a mental health professional.
Its not like you can manipulate him into giving you some kind of amazing treat, but convincing him to leave you alone would be a massive win.
I agree. I suspect that is exactly what a lot of people intend to do.