WASHINGTON (Dow Jones)--A divided Federal Communications Commission is still struggling to complete before the end of the month key telephone competition rules adopted in concept on Feb. 20. While some in the agency are optimistic the job will be completed by next week, others aren't so sure. The commissioners are scheduled to vote on a major rewrite of media ownership rules by June 2, possibly making completion of the phone rules difficult before then. Meanwhile, a trade association representing the dominant local telephone companies said investment is on hold until the FCC releases the new phone rules. The delay...