Trump is not “tough” he is a thin-skinned whiner
If by thin skinned, you mean he fights back when he’s attacked, then yes he’s thin skinned.
Do you remember how George Bush refused to hit back at his critics and allowed them to define the narrative regarding weapons of mass destruction, etc.? That’s because he wasn’t “thin skinned”. Do you remember how during the Presidential debate, Romney let Candy Crowley lie on behalf of Obama regarding his response to Benghazi, without fighting back? That’s because he wasn’t “thin skinned”. Apparently that’s the kind of response to attacks that you admire.