Roger Mudd, the longtime political correspondent and anchor for NBC and CBS who once stumped Sen. Edward Kennedy by simply asking why he wanted to be president, has died. He was 93. CBS News says Mudd died Tuesday of complications of kidney failure at his home in McLean, Virginia. During more than 30 years on network television, starting with CBS in 1961, Mudd covered Congress, elections and political conventions and was a frequent anchor and contributor to various specials. His career coincided with the flowering of television news, the pre-cable, pre-Internet days when the big three networks and their powerhouse...