It wouldn’t matter if they had. He’s doesn’t listen to anything he doesn’t want to hear. At this point one can safely assume that he was told exactly how this strategic defeat would play out, and it went in one ear and out the other.
From Feburary:
https://www.axios.com/2026/02/23/iran-strike-trump-gen-dan-c...
Joint Chiefs Chairman Gen. Dan Caine has been advising President Trump and top officials that a military campaign against Iran could carry significant risks, in particular the possibility of becoming entangled in a prolonged conflict,
Recently:
https://www.ms.now/news/trump-iran-war-haberman-swan-book-in...
“He felt that this regime was a paper tiger, that this was going to be a fast war,” Swan said on “The Last Word.” “He just said he felt that that was going to be the case, that they were going to collapse very quickly.”
“It’s a form of magical thinking, actually, is what it all boils down to,” he added.