i don't. i found the same information. that one website paul listed is the ONLY one that says that, all the others say he's worth between 300 and 400K...
https://popularnetworth.com/casey-desantis/
this link says his wife is worth between 1.5 and 3 million....as do ALL the other websites i looked at...no one but the caknowlwdge story that paul linked says anything different...which makes me very hesitant to just believe that they're worth more than 4 million total, as a couple...if anyone can provide more than that one link to the contrary, i'm more than willing to read it