Congo opposition party expels top official in sign of infighting

By Aaron RossKINSHASA (Reuters) - Democratic Republic of Congo's largest opposition party said itexpelled one of its leaders on Saturday amid infighting that weakens its effort to force President Joseph Kabila to stick to a deal to step down after an election this year.The Union for Democracy and Social Progress (UDPS) said it dismissed deputy secretary-general Bruno Tshibala for contesting the designation of successors to veteran leader Etienne Tshisekedi, who died last month.The party is part