Florida prosecutors have accused number one talk radio host Rush Limbaugh of "doctor shopping" in their investigation into Limbaugh's misuse of prescription painkillers. But on Friday, the top talker's attorney Roy Black returned fire, saying that the Palm Beach state attorney's office is engaged in what amounts to allegation shopping. "[This investigation] started out [alleging] he's part of a drug ring, or drug trafficking," Black told NBC's "Today Show." "Then, supposedly, he does money laundering. Now they've gone all the way to say doctor shopping." "Every week it is something new," the celebrated lawyer told NBC interviewer Lester Holt. Black...