Biden is suffering from old age dementia. He will not be able to actually run a campaign. He will not be able to debate or handle unfriendly media. He will try to hide like Hillary.
The reality is that Biden is only there so democrats can get to centrist democrat money. The money will flow into PACs to support Biden then he will get knocked out of the race. Everyone in the party knows Biden can’t go the distance.
Oh, piff. He's a RAT. Nominees are mere figureheads. The actual campaign will be staffed and run by the RAT machine.