I checked in Trump’s Twitter and he never used that name in a Tweet. Alfred Neuman used the phrase “What, me worry?”. I’ve seen it targeted at Biden. Also Bottygig comes up. I’ve seen reference to Trump being the Alfred E Neuman of Presidents as well.
Trump referred to Bootygig as Alfred E Neuman kinda sideways here:
https://twitter.com/realDonaldTrump/status/1327950785959915520
Politico called Trump the “What, me worry?” President:
https://www.politico.com/magazine/story/2018/06/08/donald-trump-beliefs-what-matters-fatalism-218663/
That’s the best I got.
Many thanks #1pal !
(Off topic, found on twttr
https://twitter.com/AZ_TeeTime/status/1660615002745892864
)