Brannon P. Denning (Samford University - Cumberland School of Law) has posted
The Case Against Appointing Politicians to the Supreme Court (Florida Law Review Forum, Vol. 64, p. 31, 2012) on SSRN. Here is the abstract:
In this brief comment on Ben Barton's "An Empirical Study of Supreme Court Justice Pre-Appointment Experience," I argue that appointing persons currently or formerly active in partisan politics would likely not benefit the Court as some have claimed and might affirmatively harm the Court as an institution.