Democrat Assails Rove's Remarks on Iraq By RAYMOND HERNANDEZ WASHINGTON, June 18 — Representative John P. Murtha, the Pennsylvania Democrat and Vietnam War veteran pushing for a quick withdrawal of American troops from Iraq, today mocked Karl Rove, the president's senior adviser, for championing the war while "sitting in his air-conditioned office on his big, fat backside." Mr. Murtha, in an appearance on the NBC News program "Meet the Press," was responding to a speech Mr. Rove delivered in New Hampshire last week attacking Democrats for what he called "that party's old pattern of cutting and running." When Mr. Murtha...