Ugandan opposition fails to pick one challenger to Museveni

By Elias Biryabarema KAMPALA (Reuters) - Ugandan opposition parties said they have failed to unite behind a single presidential candidate for next year's vote, potentially weakening their challenge to veteran leader Yoweri Museveni. Members of the six movements had decided in June to put years of divisions behind them and take on the government together as a coalition, The Democratic Alliance (TDA). Museveni has dominated the east African nation for almost 30 years and won plaudits for his econo