I hate to admit it but he has been very easily distracted, and I get that he’s tenacious about making his point but when you’re running for President, there’s going to be a lot of petty distractions. He needs to stay focused on what matters. Insignificant individuals wouldn’t get any coverage at all if he ignored them. No one even watched the Dems convention or knew about this guy’s speech until Trump brought it into the spotlight. Time to let it go and move on. Get back to the point about the corrupt system and don’t worry about the gnats.
The Dems know that he can be distracted by an attack, then spend days dealing with the (pre-arranged) media hype about it. Trump needs to attack Hillary as unfit for the office because of corruption and incompetence, and why his plans will help the middle class, make us safer, and generally make America great again. Ignore the distractions, they don’t win over voters, and they cost precious time.