The NY Times offers this report. A snippet: “But to some people who study judicial ethics, Mrs. Thomas’s activism is raising knotty questions, in particular about her acceptance of large, unidentified contributions for Liberty Central. She began the group in late 2009 with two gifts of $500,000 and $50,000, and because it is a 501(c)(4) nonprofit group, named for the applicable section of the federal tax code, she does not have to publicly disclose any contributors. Such tax-exempt groups are supposed to make sure that less than half of their activities are political.”