TALLAHASSEE - Katherine Harris' floundering U.S. Senate campaign lost its high-level staff again this week and is groping for a message -- which doesn't surprise Republican insiders who trace the seeds of her trouble to the story of ``Joe's dead intern.'' This wasn't any old Joe. It was Joe Scarborough, host of the prime-time MSNBC show Scarborough Country and a former Pensacola Republican congressman who was courted last summer by national Republicans to run against Harris. But before he could announce he wouldn't, Harris called major donors and suggested Scarborough would have to answer questions about the strange death of...