Democratic presidential candidate Bernie Sanders chuckled on Saturday at Hillary Clinton's suggestion that she will be the candidate to do more "than just give a speech for [voters], not just sort of appeal to their emotions."

"I think they're getting nervous," Sanders said after addressing AFSCME union members at an event in Altoon, Iowa, according to NBC News.

"I think the secretary's people are getting very nervous about the kind of enthusiasm and energy our campaign is bringing forth," he added. "But let me be very clear, I think everybody knows this. We're not just giving big speeches. We're not just drawing huge crowds."

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