One good argument for a vote before Nov. 3 is having a full Court of nine Justices in the event of a contested election (see nearby). The country would not be well served by 4-4 votes that allow disputes to be settled by a cacophony of lower courts. The Court itself will suffer if it looks dysfunctional on the crucial legal questions surrounding the legitimacy of an election. If Majority Leader Mitch McConnell has the votes to confirm, the case for doing so before Nov. 3 is compelling.
Of course, there’s no good argument at all, per Dems.