Boris Yeltsin

Boris Yeltsin was a Russian politician who became President in 1990. In 1991 he became the first popularly elected leader in the country's history, guiding Russia through a stormy decade of political and economic retrenching until his resignation on the eve of 2000. But on April 23, 2007, Yeltsin surprisingly died from heart failure.
http://www.britannica.com/eb/article-9077917/Boris-Yeltsin