I don’t think Trump has any good reason to notice Kasich. The ad speaks for itself, it tries to make a slippery slope, but one that no Trump supporter will accept as plausible. IOW, the ad helps Trump and hurts Kasich, no need for Trump to remark on it.
Hillary’s big talking point now his how full of hate the Republican Convention was. The media is full of hate toward Trump. They seem to love Clinton and her running mate and hate everything Trump says. The news is always biased and favors the Democrat candidate. Trump should keep exposing the bias in the media.