Depends on the public believing that the DEMs won the election. Otherwise that scheme would work. Any time up to Congress counting electoral ballots sent by the states.
This one is to adjourn the senate, setting up a series of pro forma sessions, reconvening if a covid bill comes up, or at a date certain.
The time between the general election and the electors casting ballots allows substitution. The party can replace both names on the ticket. Would be a frenzy of litigation - most interesting.