KAMPALA—Opposition leader Bobi Wine said on Monday he was dropping a legal challenge to Uganda’s presidential election results that handed victory to incumbent Yoweri Museveni, saying Supreme Court justices hearing the case were biased. Museveni, a former guerrilla leader who has led the East African country since 1986, was declared winner of the Jan. 14 election with 59 percent of the vote, while Wine was given 35 percent. Wine, 39, a pop star and lawmaker whose real name is Robert Kyagulanyi, has rejected the results and said he believed victory was stolen from him. He asked the court to overturn the results on several grounds including widespread use of violence. “We have decided to withdraw from their court,” Wine told a news conference in the capital Kampala. “The courts are not independent, it is clear these people (judges) are working for Mr. Museveni.” As proof, he cited the court’s decision …