by Constantine Chimakure, Zimbabwe Independent, Zimbabwe - President Robert Mugabe has a mountain to climb if he is to win the anticipated presidential election run-off against MDC leader Morgan Tsvangirai, which is legally expected to take place before May 23. An analysis of the March 29 presidential election results announced last Friday by the Zimbabwe Electoral Commission (ZEC) shows that it would be a huge task for Mugabe to beat Tsvangirai if opposition forces unite behind the former secretary-general of the Zimbabwe Congress of Trade Unions.