LAKE FOREST Potential presidential candidate Barack Obama stood before one of the country's largest evangelical churches Friday for a frank discussion of sexuality and spirituality that included the declaration that condoms should be made more widely available to fight AIDS. The Democratic senator's appearance at the Saddleback megachurch was a source of dispute among evangelical leaders, with some of the most conservative saying that a politician who supports abortion rights should not have been allowed to speak at such a prominent church. Obama urged unity despite political differences to fight the disease that has killed 25 million people since the...