HARARE, Zimbabwe - Ruling party and opposition officials agreed on Wednesday to reconvene next month, despite gaping differences over how to resolve their dispute over last month's elections. In a brief statement, the two sides said they adopted a set of procedural rules and "an agenda for dialogue" for the talks scheduled to resume May 13. The rules said the top agenda item was a discussion on the legitimacy of the March 9-11 polls, an apparent concession by the ruling party to keep the talks alive. The government has dismissed opposition calls for a rerun of the presidential poll, which...