Sen. Hillary Rodham Clinton, who fainted Monday, speaking yesterday about her illness. She says it was possibly brought on after a staff retreat at the Westchester Hilton in Rye. WASHINGTON — Clinton said yesterday a fainting spell she suffered might have come from food poisoning that she may have picked up at an expensive Westchester County hotel. "It was either a 24-hour virus or something we ate," ........ "Everybody ate the same thing," noted Clinton, saying that she and others at the hotel for a staff retreat all had the same meals. Clinton said that her entire 60-person staff...