Both Thomas and Scalia have attended events hosted by the Koch brothers and so have been part of the partisan political process
http://www.huffingtonpost.com/2010/10/20/scalia-thomas-koch-industries_n_769843.html
Reports that two Supreme Court Justices have attended seminars sponsored by the energy giant and conservative bankroller Koch Industries has sparked a mild debate over judicial ethics.
On Tuesday evening, the New York Times reported that an upcoming meeting in Palm Springs of "a secretive network of Republican donors" that was being organized by Koch Industries, "the longtime underwriter of libertarian causes." Buried in the third to last graph was a note that previous guests at such meetings included Supreme Court Justices Antonin Scalia and Clarence Thomas, two of the more conservative members of the bench.
If these two had any ethics, they would have recursed themselves on this case