sentences:  Without interviewing even a single witness, the OSC wrote that it was unable to investigate the complaints because only conduct, not sexual orientation, was protected under the Civil Service Act of 1978—a reversal of Bloch's April 8, 2004 statement that sexual orientation-based discrimination was prohibited due to imputed conduct and therefore that the OSC has the authority to pursue such complaints.After being embroiled in a related "internal purge" controversy (see below), Special Counsel Bloch testified before a Senate panel on May 24, 2005 and reiterated his original position that he lacked the authority to protect federal employees on the basis of sexual orientation.The next day, the Log Cabin Republicans called on Bloch to resign.