It's possible. Ultimately the voters do make the decision, even if they can be swayed. How realistic it might be, I can't say. We certainly need a lot more engagement with the process. There are far too many people ignoring the primaries and then complaining about their lack of choice in the general.
I don't believe donations or corporate backing had anything to do with Trump, for example, winning. Trump won because he genuinely appeals to the average voting American. American voters are willingly choosing to support these politicians and all of the consequences that entails.
For the president election, maybe, but without corporate backing of the GOP he would have to face an adversarial congress. Or at least, that’s the hope