NIAMEY (AFP) - Veteran opposition leader Mahamadou Issoufou was declared victor Monday of presidential polls ending a year-long military junta in Niger, which remains deeply poor despite massive uranium stores. In his fifth shot at the country's top job, the 59-year-old leader of the Social Democratic Party won 1.8 million, or 57.95 percent, of votes, said electoral commission head Gousmane Abdourahamane at a ceremony in Niamey. Former prime minister Seini Oumarou, 60, took 42.05 percent of the votes cast in the runoff election on Saturday.