D'Amato and Weld Locked in G.O.P. Feud
Feud between New York Republican gubernatorial hopeful William F Weld and Alfonse M D'Amato dates to 1996; Weld claims D'Amato gave him $750,000 for his Massachusetts senatorial campaign against John Kerry and told Weld to distance himself from Robert S Mueller III, who oversaw federal fraud investigation of D'Amato's brother Armand in early 1990's; D'Amato denies encounter took place, saying he met Weld recently; newspaper accounts indicate that D'Amato introduced Weld at 1996 fund-raiser in Washington; D'Amato has been praising Democratic gubernatorial front-runner Eliot Spitzer; photos; chart (M)
