(CNN) Former second lady Jill Biden made the case for her husband to be the Democratic presidential nominee Monday with a blunt assessment for how to beat President Donald Trump: "Electability."

"I know that not all of you are committed to my husband, and I respect that," Biden said at a campaign event in Nashua, New Hampshire, to a group of teachers. "But I want you to think about your candidate, his or her electability, and who's going to win this race."

Washington Post-ABC News poll released last month showed Biden as the only Democratic candidate who would hold a wide lead over Trump in a hypothetical general election match-up. In June, the Trump campaign fired several pollsters after the public release of internal numbers that showed the President trailing Biden in states like Michigan and Wisconsin. Trump later told Fox News the figures were "incorrect."

"So I think if your goal -- I know my goal -- is to beat Donald Trump, we have to have someone who can beat him," the former second lady said Monday.

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