Rep. John Murtha (D.-Pa.) appears to be suffering "Daschle-itis," a figurative disease which makes entrenched incumbents become national celebrities and, in the process, risk alienating the voters that put them in office. Since seizing his party's anti-war mantle, Murtha has become a great draw for Democratic fundraisers, helping his party boost its prospects for a congressional takeover. Naturally, this helps his party-leadership bid as well. But at the same time, his outspokenness made him a huge target for the Internet right. His district went for John Kerry with only 51% in 2004. What originally seemed like a long-shot bid by...