Trump and Oprah, as I recall, were somewhat close early on. Both in TV, ran in the same circles. Oprah got Dr. Oz his start. Its not a far stretch to say that Trump and Oz might be friendly.
I doubt Trump would endorse someone swampy, but I don't know. Take it at face value, Oz might owe Trump some key votes if he got in. But lets see how it plays out.
Let's look at what we do know.
Oz has come out for Trump and election reform. Believe me he knows he has just kissed his television career goodbye!
Whether he wins or loses his career is over in television m so he did risk it.
Why? Hmmmmm.