Will the Pubbies have the guts to pull a Bork on the next Obama appointee - I’m not so sure. However, if they don’t I see a potential pitchfork uprising by a lot of us out in the fields.
From what I’ve heard on TV, there is a precedent for not approving a SCOTUS appointee of a Lame Duck Prez (IIRC about 80 years). Also, there is nothing written about the number on the SCOTUS, so if we have 8 rather than 9, perhaps not an issue from that perspective, but could mean tied votes or worse for upcoming cases like immigration, Little Sisters of the Poor, etc.
There is only one candidate maybe two who will fight to stop this appointment this year and win. The rest of the Party will surrender.