The only way Bloomberg can win is as a compromise candidate in a contingent election decided by the House.
What about a compromise candidate in the electoral college itself? The Sanders electors throw their support to Bloomberg, because not doing so means the election is thrown to the GOP-controlled House, which would give it to Trump. In exchange, Bloomberg gives the Dems a bunch of Cabinet positions and policy concessions.
That's an interesting possibility, but it's unlikely that that would be enough since Michigan, Minnesota, and possibly other states have faithless elector laws that void the votes of faithless electors.
