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donald trump chicago protesters gergen ac live_00003223
donald trump chicago protesters gergen ac live_00003223

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    Gergen: This is a test of Donald Trump's leadership

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Gergen: This is a test of Donald Trump's leadership

David Gergen, former presidential adviser, says this large protest at Donald Trump's rally in Chicago "might be one of the most important moments of the campaign."

Gergen: This is a test of Donald Trump's leadership

David Gergen, former presidential adviser, says this large protest at Donald Trump's rally in Chicago "might be one of the most important moments of the campaign."