Read the transcript
"...........e Trumps nervous. Maybe hes nervous after that debate. Maybe hes worried. The polls dont indicate it. Maybe hes worried that Cruz and Rubio are gaining on him, and he doesnt want to tick off anybody that might vote for him."
That's verbatim
It might get messy... :)
And verbatim, it says nothing whatsoever about David Duke or the KKK.
They aren't white supremacists. They are, mostly, white youth who are disaffected and see their race, quite frankly, being marginalized and destroyed.
That said, things are pretty fluid right now. The future isn't with people who still, at this stage of the game, don't even realize both parties have been co-opted. It's not with 60 year olds who still want to play R's good, D's bad.
Trump knows this. He has to walk a very tight wire, because the cards today may very easily not be the cards tomorrow.