KIRKWOOD, Mo. - Six weeks after a deadly shooting rampage rife with racial overtones in Kirkwood's City Council chambers, the issue of race has spilled over into the contest for mayor of this St. Louis suburb and produced a uniquely tense campaign. A community activist, Michael Moore, is running as the sole black candidate in the four-way contest and has portrayed the Feb. 7 rampage as a symptom of smoldering black resentment in Kirkwood. At a recent standing-room-only candidate forum, the 37-year-old truck mechanic let voters know he wants to overhaul a city government that he says ignores poor, black...