Hypothetically, if you were a billionaire that suddently had a change of heart and wanted to go against trump, how dangerous would it be to resist?

What do you mean by “go against?”

Assassination is right out. Too much to risk.

Cast shade on his politics? Easy. You can rent a large enough number of billboards around the country to start an influence campaign on the cheap, getting republicans to start asking if they’ve been betrayed. We’re talking a few million a year. Much as the republicans chipped at the dem base in the election, you just need to get enough of them angry to start the fighting and finger pointing in their own house.

Rent a few republican legislators and get them to start throwing a wrench in things? Doable, but you have to steer them a bit. Probably 2 to 3 times the cost of the billboards. You also need to make them feel they come out on top for the noise they make. Probably call them “the loyal trump faction” and have them go overboard demanding things faster than the american people will take.

Start a competitor to twitter? Probably lose 100mm a year to start, but it can be done.

There are lots of things you can do.