The charge is actually to protect him.
If Biden loses and a real prosecutor gets ahold of him, they could charge him with real serious crimes until he flips.
Now, with this plea deal, that will never happen, because he’ll have immunity.
The plea deal will probably be sealed so no one will know where and for how long he is sentenced. He’ll probably get an all expense (taxpayers) trip to some tropical resort to pay his debt to society as a snowbird.
It’s all for show or he could have easily been the one first prosecuted. But that would have broken the deal he had with Nancy.
EC
Under a theory of Double Jeopardy, presumably?