I’m not sure if “Dithering Donald” will catch on, I also like “Don the Con” and “Deluded Donald” but maybe “Opportunist Trump” would work, or “Two Faced Trump”. Regardless, I think it is important to frame Donald Trump’s lack of any true core beliefs or principles for what it is, pure opportunism.
opportunist
noun
someone who tries to get an advantage or something valuable from a situation without thinking about what is fair or right
Do we really want an opportunist who will say or do anything that benefits himself, as our President?
dither
verb
to delay taking action because you are not sure about what to do
Another symptom of his indecision, even within the same sentence, is his inability to make a choice.
dither
verb
to act irresolutely; vacillate
Resolute is not something you will ever hear someone call Donald Trump. Everything is negotiable.