Trump is making a significant mistake here.
Donald, spend your time telling us about your ideas and plans. I don’t need to hear anything from you about how bad Carson, Bush, etc. are. I can draw those conclusions on my own.
I agree with you. Carson is fundamentally likeable. Ad hominem attacks on Dr. Carson are going to have mixed results. Attack his positions and fitness for the job, which are relevant and which are not too sturdy.