Late this week, a discussion at Morning Joe centered on how weak the Trump campaign is due to entrenched mixed messaging. Per Joe Scarborough, the mixed messaging cancels out all of them.
I think that his profound mixed messages means that his base of supporters can pick & choose which one suits them & blow off the rest.
The bottom line is that Donald Trump's one constant is pitting American against American. He is consistently successful at building up hate & tearing down trust. I totally disagree with Mika that Donald Trump is unable to hew to a strategy. He makes the strategy hew to him.