WEST PALM BEACH, Fla. - Here's something you probably never expected from Rush Limbaugh: No comment. The nation's talk radio king, opiner on everything from Bill Clinton's misdeeds to feminazis, repeatedly declined Friday to discuss accusations that he illegally bought prescription drugs. "I haven't yet gotten to the bottom of what all this is about," Limbaugh said during his three-hour broadcast, which reaches an estimated 20 million listeners. But when he knows more, he promised, "I'm going to come clean, as I always have." Instead, Limbaugh used his electronic bully pulpit to defend -- and refuse to apologize for --...