It would be to our advantage to use the constitutional option now to replace O'Connor, that way we are ensured that only 50+ VPOTUS are needed to confirm the next nominee.
Some wobbly RINOs might be scared to go nuclear when we are replacing Stevens or Ginsberg.
That's exactly why I think the Democrats will cave before we can use it on this nomination. If they are even remotely intelligent, they'll adopt the "live to fight another day" principle.