The Trump has to challenge all of these blanket pardons in court.
The courts have already decided two things.
1. the person being pardoned must accept the pardon. A pardon can be rejected by the recipient.
2. Accepting a pardon is admitting to guilt.
How does a person receiving a blanket pardon admit to guilt? What crime is he admitting to? For example, Joe pardoned Hunter for any crimes he may have committed over a period of years. So if Hunter, by accepting the pardon, admitting guilt of all crimes? Murder, rape? bribery, extortion, etc.? He didn't reject the pardon so we have to assume Hunter is guilty. And if he is guilty then isn't Joe also guilty?
Congress should haul every single person pardoned into hearings and ask them do they accept the pardon issued by Joe Biden, and if they say yes, then ask them to what crimes do they admit guilt. If they admit to no crimes then their pardons should be declared invalid and rejected.