I understand a lot of Trump supporters would rather he focus more on the issues, but there’s a method to Trump’s madness. There will be time to be more presidential later, but right now Trump knows that if he doesn’t win the nomination then none of it matters. You may find it distasteful, and I respect that, but Trump knows what he’s doing. He’s getting under their skin with personal insults that have a ring of truth. The youthful jab at Rubio wouldn’t have the same effect on someone like Cruz, because Cruz is obviously a serious thinker. But with Rubio, there’s some truth to it. Same with the ‘low energy’ characterization of JEB.
The way I see it at this time.
Hey! Don’t go and ruin all the fun by having the correct analysis of his tactics!