You're right in many ways.   The same bankers and billionaires would be sniffing at Trumps tail if they thought he had a chance to win the election.

If Trump was the favorite at this point, they'd be pouring money into his campaign and lining the coffers of Republican candidates.     * Take a look at some sites the measure donations and lobbying.  Open Secrets is my personal favorite at the moment.

Big money will swing like a door from Republicans to Democrats depending on who has the majority power.  

Corporate money will target committee chairs,(determined by the majority party), as a way to influence legislation that makes it to the floor, or not, and is filled with special favors for 'friends' at the committee level.     It's fact, not opinion GBA.    Big money follows power, not political ideology.      Money seeks power.  In normal times it favors the more laizze faire Repbulican, but always hedges it's bets by donating to those in power, regardless of par