Comment by mmh0000
He literally said he was gonna:
"Trump vows massive new tariffs if elected, risking global economic war"
https://www.washingtonpost.com/business/2023/08/22/trump-tra...
(https://archive.is/20231125045858/https://www.washingtonpost...)
EDIT - Found this after my post, a MUCH better "he said it":
https://www.donaldjtrump.com/agenda47/agenda47-president-tru...
And he did it last time too: https://en.wikipedia.org/wiki/Tariffs_in_the_first_Trump_adm...
“Living under a rock” is the technical term, I believe.