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During the Perez/Bernie rally in Portland, Maine on April 18, something interesting happened. The crowd cheered when Bernie took the stage. But when Perez was even mentioned, the crowd responded with loud boos. They spoke at a podium that read: "Come Together -- Fight Back." But not everyone was ready to come together for Perez, whom some still see as part of the Democratic establishment. (This photo is from a rally in Miami.) (Getty)