Never happen. Impeachment won't take place until the Republicans get leadership of Congress, and even that's a big MAYBE. If the party does anything, they'll ask him to step down, however Biden will never do that. It's my theory that he never wanted the job to begin with. His wife wanted to be first lady so bad she could taste it. Now that he's a proven failure, she's keeping the low down and staying away from any cameras in the room.
The only advantage I could see with Whorris is that she's a do nothing. She's done nothing as VP and nothing as a Senator, so at least she'll be more hesitant to make policies that will further destroy the country.