Senator Joe Lieberman (I-CT) wrote to the Internal Revenue Service (IRS) requesting clarification of its standards for investigating candidates' and elected officials' appearances at churches. Lieberman questioned why the IRS chose to investigate the United Church of Christ for possibly violating the ban on partisan electioneering with a speech by Senator Barack Obama (D-IL). The letter states; "I find the Service's inquiry especially troubling because of the Service's inadequate guidance in this area. Publication FS-2006-17, which the Service issued in February, 2006, and posts on its website, states that candidates may be invited to speak at churches in their individual capacity, and that depending on the circumstances, such invitations can be granted 'without jeopardizing its tax-exempt status.'" "But I am concerned about the chilling effect on legitimate activity by religious organizations that results from initiating a church tax inquiry without first satisfying the reasonableness standard, and I am further concerned by the lack of clear guidance in this area."