Mamdani is fairly unique among Democrats in that he's calling for output legitimacy, something that Hillary Clinton outright rejected because she thought "things might just go wrong despite me doing the right things". Trump would, of course, make excuses about anything that goes wrong or deny that anything goes wrong but he's never going to make a show of low agency the way Clinton did.

https://macleans.ca/general/two-concepts-of-legitimacy/