I used the exact same seed and a very similar prompt for all of them, but for a reason that I ignore, the style changed for the most recent ones. I tried to reproduce the style of the first ones for the concerned Presidents, but it wasn't convincing (excepting for Biden, that's why he also has the style of the first Presidents).
As a connoisseur of American politics, I am disappointed by the AI's failure to properly render the likenesses of some of these presidents. Great quiz though!
Thanks for your comprehension.
Also, it seems the AI gives modern neckties to a lot of presidents who never wore one.
Thanks for this comment!