New Doping Investigations Could Tarnish Olympic Gold

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We update the latest developments in the Russian Olympic doping scandal, and the potential impact on this summer's games in Brazil. Guest host Todd Purdum hears from experts on anti-doping efforts and Olympic history, and an American athlete who might win a medal if her Russian opponent is disqualified.

Later on the program, surveying support for Donald Trump: Are voters reluctant to tell pollsters they like him?

Photo: RIA Novosti