If I were a cold-blooded Democratic strategist I would have the CIA “take care” of Biden—helicopter crash would be good, could be blamed on Iranian terrorists—a month or two before the convention.
They could let the delegates and candidates duke it out for the nomination on the convention floor—the winner would probably be the strongest candidate and have bragging rights going into the election.
Waiting until the last minute has too many risks—not a certain failure but just riskier.
Quite possible, but I, still, opt for a fall, on the stairs at one of his Deleware mansions, witnessed only by “Doctor” Jill, that kills him, outright or leaves him in a coma, worse than the one he’s already in.