Donald Trump simply cannot bear to be challenged or questioned in any way. Any time someone takes issue with him, he responds with irrational anger, whining, and playing the “I’m so persecuted” card. He is a child. Imagine how he’d react to being challenged as president by other politicians or world leaders.
Especially since his remarks about John McCain, Trump has responded with childish insults to McCain, Rick Perry and Lindsey Graham. After Lindsey Graham called him a jackass, he has responded with a rambling, Palin-esque, nearly incoherent speech in which he upped his attacks on Graham and gave out Graham’s cell phone number.