Trump was in on it from the start, with Fauci, Birx, the CDC, and "Operation Warp Speed". He, and his enthusiasts, could display a lot of intellectual honesty by admitting that they screwed up "bigly".
I have to disagree. I think he believed what he was told that the shot would end the pandemic. Like I said, he got bamboozled because he wanted it to be true too bad.