Description:Zimbabwe's President Robert Mugabe on Saturday rallied his ZANU-PF party for an electoral victory in polls expected later this year, which would extend his 33-year grip on power. Addressing a party rally to mark his birthday, Mugabe, who turned 89 last week, denied accusations by the rival Movement for Democratic Change (MDC) of Prime Minister Morgan Tsvangirai that ZANU-PF had launched a violent campaign around the southern African state to win the presidential and parliamentary polls.(0:45)