Democratic presidential candidates are hoping to woo Iowa voters as the the state holds the first nominating contest of the 2020 election on Feb. 3.
Scenes from the 2020 Iowa Caucuses

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Attendees hold letters that read "CAUCUS" during a campaign event in South Bend, Indiana, Feb. 2, 2020.

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Democratic presidential candidate Pete Buttigieg arrives to speak at a campaign office the day of the Iowa caucuses, Feb. 3, 2020, in West Des Moines, Iowa.

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Caucusgoers check in at Roosevelt High School, Feb. 3, 2020, in Des Moines, Iowa.

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Democratic presidential candidate Sen. Elizabeth Warren, D-Mass., speaks at a caucus at Roosevelt High School, Feb. 3, 2020, in Des Moines, Iowa.