When the conservative financier Charles Koch sent out invitations for a political retreat in Palm Springs later this month, he highlighted past appearances at the gathering of “notable leaders” like Justices Antonin Scalia and Clarence Thomas of the Supreme Court…

The group, Common Cause, filed a petition with the Justice Department on Wednesday asking it to investigate whether Justices Antonin Scalia and Clarence Thomas should have recused themselves in the case involving Citizens United because of their attendance at past retreats organized by the conservative financier Charles Koch, whose company operates a foundation that is a major [right-wing] contributor to [right-wing] political advocacy groups.

Common Cause also cited the role of Mr. Thomas’s wife, Virginia Thomas, in forming a [right-wing] political group opposed to the Obama administration as grounds for his disqualification.