Poor Patrick. It's not what people would be expected to say about a rich kid who sailed into a House seat on the strength of his family name. But in Washington, where politics is both profession and blood sport, Rep. Patrick Kennedy (D-R.I.) has long been seen as a figure of sadness. "Most people feel sorry for him because he's obviously troubled," said a veteran Democratic consultant after the 38-year-old Kennedy announced his return to drug rehab after crashing his car on Capitol Hill. "He walks around as though he has the weight of the world on his shoulders," the...