Look at the DC v Heller 2nd Amendment decision.
For - Scalia (Reagan appointee), Kennedy (Reagan), Thomas (GHWBush), Alito (GWBush), and Roberts (GWBush)
Against - Stevens (Ford), Souter (GHWBush), Ginsburg (Clinton), Breyer (Clinton)
McCain voted for Thomas, Alito, Kennedy (who isn't always right, but I think is better than conservatives give him credit for), and Roberts.
Obama voted against Roberts and Alito. Considering we were one vote away from the 2nd Amendment going completely down the crapper, this reinforces my current decision to hold my nose and vote for McCain.