He had lead responsibility in the White House for advising the President on all aspects of U.S. relations with the fifteen countries of the former Soviet Union .
He was Special Assistant to President Bill Clinton and Senior Director for Russia , Ukraine , and Eurasia Affairs .
Assistant had lead responsibility in the White House for advising the President on all aspects of U.S. relations with the fifteen countries of the former Soviet Union .
He was Special Assistant to President Bill Clinton and Senior Director for Russia , Ukraine , and Eurasia Affairs .