Ned Foley has posted this very important draft on SSRN. Here is the abstract:

Congress could face a disputed presidential election triggered, not necessarily by foreign interference, but by the ballots counted after Election Night that cause the initial apparent winner to fall behind. If Congress receives conflicting submissions of electoral votes from the same state, the existing statutory and constitutional provisions for handling this conflict are ambiguous and vulnerable to partisan posturing. Bicameral deadlock, in which the Senate claims one presidential winner while the House claims the other, would resemble the disputed Hayes-Tilden election of 1876 in a way that Bush v. Gore in 2000 did not. This kind of bicameral deadlock, if it lasted until noon on January 20, 2021, would cause serious difficulties in the capacity of the nation to transition from one presidential term to the next pursuant to the rule of law. It is in the nation’s best interest to confront this vulnerability now, in order to be in the best possible position to handle this kind of situation if it should arise.

Ned tells me this is still very much a draft in progress and that he welcomes comments.