The problem with Trump isn't that he gets intimidated - it's that he's excessively thin-skinned and so gets too easily baited by attacks.
Thin skinned? Let’s see you have your entire life, business and family destroyed on a daily basis and see how you handle it. I know I’d have a hard time.
George W took the opposite tactic and he wrecked us by not fighting back.
He was worse than Trump in his results.
Thin skinned? I see it as someone who doesn’t like being lied about and who calls those out that do. Hes a believer in nipping things like that in the bud before the people saying them think they can get away with it and proceed to do it again. Letting lies stand gives them credence and the liars the upper hand.