Zambian president Lungu re-elected in disputed vote

By Chris Mfula and Stella Mapenzauswa LUSAKA (Reuters) - Zambian President Edgar Lungu narrowly won re-election on Monday, in a vote his main rival Hakainde Hichilema rejected on claims of alleged rigging by the electoral commission. Lungu faced a tough challenge from Hichilema to rule over Africa's second-largest copper producer, which has suffered from an economic slump due to depressed commodity prices. Lungu, who narrowly beat Hichilema in a vote last year to replace late president Michael S