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    Former U.S. Defense Secy. on 'dangerous' Trump campaign

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Former U.S. Defense Secy. on 'dangerous' Trump campaign

William Cohen, who also served as a Republican senator for nearly 20 years, speaks with Christiane Amanpour about the state of the presidential race.

Former U.S. Defense Secy. on 'dangerous' Trump campaign

William Cohen, who also served as a Republican senator for nearly 20 years, speaks with Christiane Amanpour about the state of the presidential race.