How could Russia trick American billionaires into supporting a candidate that undermines their global ambitions?

Simple, by propaganda. Or did you think billionaires were immune? I’d say they are even more vulnerable because they surround themselves with yes men that agree with anything they say. Sprinkle that with a ton of blackmail and you got yourself a russian asset.

May even use their greed for profit against them, whether it is from the war industry, exotic metals, or plain old deals. They will get their share and destroy democracy if it is in the way.