HARARE, Zimbabwe - Zimbabwe's main opposition leader insisted Tuesday that he has won presidential elections outright and denied that his advisers were involved in talks to allow President Robert Mugabe a graceful exit. Morgan Tsvangirai told his first news conference since Saturday's elections that he was waiting for an official announcement of election results before he would enter any discussions. "Our country is on a precipice, on a cliff edge," he said. A businessman close to the Zimbabwe Electoral Commission, or ZEC, and a lawyer close to the opposition said earlier that aides of Mugabe and Tsvangirai were discussing how...