Dem convention host: Sanders supporters better 'behave themselves' when he loses
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The chairman of the Philadelphia 2016 Host Committee for this summer’s Democratic National Convention said supporters of presidential candidate Bernie SandersBernie SandersAmazon workers have spoken — are progressives listening? What's really behind Joe Biden's far-left swing? It's time to declare a national climate emergency MORE have to “behave themselves” when the Vermont senator loses the nomination.

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During a radio interview with John Catsimatidis, Ed Rendell, a former Pennsylvania governor and Democratic National Committee chairman, laid out his vision for how the convention would play out.

“I think it’s gonna be a great convention, but of course the key to it is the Sanders people. Bernie’s gonna have his name placed in nomination; we’re gonna have a roll call; there’s gonna be a demonstration in support of Bernie; he’s gonna lose the roll call,” he said. “His supporters have to behave and not cause trouble. And I think they will, and I think Sen. Sanders will send them a strong message.”

Sanders is trailing Democratic front-runner Hillary ClintonHillary Diane Rodham ClintonHow Democrats can defy the odds in 2022 Close the avenues of foreign meddling Pelosi planned on retiring until Trump won election: report MORE by 774 total delegates. Clinton is just 155 delegates from clinching the nomination.

--This report was updated at 11:22 a.m.