Not directly for him, no, you are not.
But if he were the nominee you advanced the argument that Judges alone should argue for support for the Republican.
I don't support your conclusion a Republican guarentees success on the Courts. Especially when that Republican admires O'Connor and prevents Constitutionally minded judges from receiving an up or down vote.
On most of the candidates seeking the W.H. I'd be forced to roll the dice, and probably would, on this issue that they'd continue G.W.B's record. With McCain I know what he would do. Your argument cannot dent his record on the issue.
Federal judges and the Electoral college are TWO SOLID reasons to defeat democrats.
There is no way around those two facts.