Partisanship and the supreme court: summary

Agrees with co-partisans Disagrees with co-partisans
Agrees with counter-partisans Bridge-builders: Kennedy, Roberts Traitors: ∅
Disagrees with counter-partisans Loyalists: Kagan, Ginsburg, Breyer, Sotomayor, Scalia, Alito Mavericks: Thomas

Something like this. Perhaps, Justice Stevens could be classified as a traitor (to his party–he was appointed by Nixon Ford but in later years voted with the Democratic appointees–which is not the same thing as saying that he was a bad justice, of course). Among the loyalists, Scalia and Alito vote in a less consistently partisan manner than the other four.

The table is based on my previous posts: here, here, and here.