Justices voting together:

SCOTUSBlog reports on how often pairs of Justices voted together. Here are the top 9 percentages (counting those times that the Justices agreed with each other entirely):

Souter

Ginsburg

85%

Rehnquist

O'Connor

79%

Rehnquist

Kennedy

77%

Stevens

Souter

77%

Ginsburg

Breyer

77%

Stevens

Ginsburg

75%

Scalia

Thomas

73%

O'Connor

Breyer

70%

Souter

Breyer

70%

The big surprise to me: O'Connor and Breyer being so close.

Not a surprise at all: Scalia and Thomas, though they vote together often, are only #7 on this list.

The lowest percentage: Unsurprisingly, Stevens and Scalia, at 38%.