You are using incomplete DATA. Trump has given REPS some 3/4 million and 250K to DEMS. Using half ass sources for facts results in a flawed conclusion.
http://mischafisher.com/donald-trumps-campaign-contributions.html
Numbers aside, Trump has supported Dems. The claim of “that’s how business works” is easliy refuted by the Koch example. Trump wasn’t required to support liberals, he chose to.
Was it because he agreed ideologically or because of personal gain expediency? Does it matter?