By JAMES RISEN WASHINGTON, Nov. 5 — As American soldiers massed on the Iraqi border in March and diplomats argued about war, an influential adviser to the Pentagon received a secret message from a Lebanese-American businessman: Saddam Hussein wanted to make a deal. Iraqi officials, including the chief of the Iraqi Intelligence Service, had told the businessman that they wanted Washington to know that Iraq no longer had weapons of mass destruction, and they offered to allow American troops and experts to conduct an independent search. They also offered to hand over a man accused of being involved in the...