The short answer is that Trump said that the President can’t be held accountable for criminal acts done while in office, and the Supreme Court agreed. I believe he went as far as to say that the President is immune to prosecution for having political opponents assassinated, but I can’t remember if that’s true or not. Regardless, the implication here is that Biden should do whatever is necessary to prevent another Trump presidency since he has presidential immunity.
The short answer is that Trump said that the President can’t be held accountable for criminal acts done while in office, and the Supreme Court agreed. I believe he went as far as to say that the President is immune to prosecution for having political opponents assassinated, but I can’t remember if that’s true or not. Regardless, the implication here is that Biden should do whatever is necessary to prevent another Trump presidency since he has presidential immunity.