General Discussion

... but then, I couldn't imagine what rationale SCOTUS could possibly come up with to stop the counting of votes in Bush v. Gore.

Of course, as Justice Breyer pointed out, the only thing that Bush v. Gore actually accomplished was to render the election in FL incomplete, and therefore unlawful under FL law... and that now it was up to Congress to pass judgement on the legality of those electors. Of course, the majority in Bush v. Gore made it clear they they knew the ruling was baseless with their admonition that the ruling did not set any sort of precedent.