Results released by the Zambian electoral commission showed that to date, Zata had 187,873 votes compared to the 96,325 votes by Vice-President Rupiah Banda, AllAfrica.com said.
The commission's Web site said with 47 of the total 150 constituencies reporting, Banda's Movement for Multi-Party Democracy was trailing Zata's Patriotic Front political party.
The reported tallies were 428,824 votes for the Patriotic Front and 228,764 for the country's ruling party, the Web site said.
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