December 14, 1999 WASHINGTON A prominent commodities trader who acknowledges a business history with a reputed Soviet Bloc crime figure and a notorious arms dealer has been one of New York Mayor Rudy Giuliani's top campaign supporters. Commodities trader Semyon (Sam) Kislin and his family also lavished thousands of dollars in contributions to Democratic Sen. Charles Schumer, to the Clinton-Gore re-election campaign, to former Republican Sen. Alfonse D'Amato and to a number of state and city politicians. Kislin sits on the New York City Economic Development Board. Kislin is not alone among emigres from the former Soviet Union who have...