(CNN) Massachusetts Sen. Elizabeth Warren, who announced on Monday that she is exploring a presidential run, is quickly assembling a robust and experienced team to lead a campaign in Iowa -- an early signal of the outsized importance of a strong showing in the state.

Emily Parcell, who worked as then-Sen. Barack Obama's Iowa political director for the 2008 caucus and as a senior adviser to Hillary Clinton in the state eight years later, has signed on with Warren, along with Janice Rottenberg, according to two sources. Rottenberg was an Ohio organizer for Clinton in 2016 and ran the Iowa Democratic Party's coordinated campaign during the 2018 midterm elections.

Former Obama aide Tommy Vietor called Parcell's hiring a "huge, huge get for Warren."

"She's one of the best political staffers I have ever worked with and knows everyone in Iowa," he tweeted on Wednesday.

Kane Miller, who was campaign manager for Abby Finkenauer, has also joined Warren's Iowa team, according to a source familiar with the development. Finkenauer defeated incumbent Republican Rep. Rod Blum in November.

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