I've read where Ginsburg would have resigned in 2004 if Kerry had somehow won, and you have to think Breyer or Souter may be holding out for a dim POTUS as well.
Which is actually funny in Souter's case because he was nominated by RR.
But for as big of a RINO as McCain is, he has pledged to appoint judges who are strict constitutionalists, and we need some with those qualifications to replace the likes of Ginsburg, who is a srict liberalist (just made that up, no copyright)
Anyone but Obama or Hillary. Anyone.