You have absolutely no way of knowing how these Rinos in the senate will vote. The question is, in a 4-4 vote whether Pennsylvania harvested ballots with no signature will swing PA and the country to Biden, what happens?
They will vote the same way they voted for Gorsuch and Kavanaugh who were both confirmed.
And the final vote will take place after the elections. And even Susan Collins (who's election will have been settled), will vote for the Trump nominee.
There will be no 4-4. Period.