“What we should demand from Hillary camp is the PROOF that Donald Trump has anything to do with alt right.”
I would be afraid that getting into a serious argument over it would make it a bigger deal and elevate it to a legit campaign issue. I think it’s perhaps better to laugh off the idea that Trump is working with the Alt-Right as ridiculous and a sign of Hillary’s desperation—she has no real answers to Trump’s numerous policy proposals, so she makes up a false narrative about him personally. Trump’s surrogates should laugh as if it’s totally absurd when asked about it and turn it back on Hillary. Ridicule often takes the fangs out of accusations.
If the Trump people do want to get serious about it, I think they should simply state the facts in Trump’s defense very succinctly and on point and then insist on moving on and not get into a back and forth over this that might last weeks (or even till Nov.) like Hillary and her media pets would want.
They are getting very, very scared.