Ideology and Supreme Court Clerkships

My colleague Geoffrey Stone comments on the ideological clerkship hiring patterns of the conservative Justices. My anecodtal impression is that Justices Alito and Thomas, in particular, do not hire anyone without Federalist Society credentials, though I am happy to be corrected by someone with more information.

UPDATE:  A colleage North Carolina writes:  "Dana Remus clerked for Sam Alito a few years back, and she
is neither a Federalist Society member nor someone who identifies as a political conservative."