KAMPALA - Ugandans voted in a tense national election on Thursday after an often violent campaign and internet shutdown, with President Yoweri Museveni seeking to extend his rule into a fifth decade. Museveni told reporters after casting his ballot in western Uganda that he expected to win 80% of the vote "if there's no cheating", dismissing the prospect of an upset victory by popular singer Bobi Wine. The election is widely seen as a test of the 81-year-old leader's political strength and