Email controversy flared over senator . Republicans believe emails could shed light on possible agency targeting of conservative groups . The email controversy is part of a larger federal investigation of agency targeting . Former government official Lois Lerner is at the center of the email controversy .
Republicans believe emails could shed light on possible agency targeting of conservative groups . The email controversy is part of a larger federal investigation of agency targeting . Former government official Lois Lerner is at the center of the email controversy .