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Trump protesters force Chicago rally to be cancelled

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Political debate: the dos and don'ts

When presidential candidates walk away from their debate podiums, how does anyone know who won and who lost? What are the tricks and tips of being a winning debater? Andrew Markoff - a champion debater, Associate Director of Debate at Georgetown University and co-founder of Speech Labs - answers these questions and more in 'the dos and don'ts' of debates. (Natalie Fertig / McClatchy)

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