Is there some other Trump you're talking about? The one on my planet doesn't know how to be cool as a cucumber. He has to react. He's like Roger Rabbit with the "shave and a haircut" bit.
ANY canidate would be responding. If Cruz had been the target he would be responding.
Basic rule of political campaigns: You never let any attack go unanswered. HOW you answer is the question.
You do realize these sort of posts make the Hate Trump Always squad look unhinged and childish right?