[1/5] Volunteers gather at the Donald Trump 2024 campaign headquarters in Iowa ahead of a door-knocking event in Urbandale, Iowa, U.S., October 14, 2023. Reuters interviews with nearly 40 party leaders, Trump staff and campaign volunteers in Iowa show how the former president has learned from his past mistakes. In 2016, Trump, thinking he had little chance of winning Iowa, kept his operation in the state threadbare. "I don't think people realize in 2016 how shoestring that was," said Jeff Kaufmann, chairman of the Iowa Republican Party, referring to the Trump campaign. In 2016 Trump didn't have the staffing or digital infrastructure to follow up on such leads, meaning many Trump supporters like Jones and her husband stayed home on caucus night.

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Persons: Donald Trump, Nathan Layne, Trump, Ted Cruz, Jeff Kaufmann, Rachel Paine Caufield, Trump's, Ron Desantis, Alex Latcham, we've, Ann Jones, Jones, Marshall Moreau, Cris Christenson, DeSantis, he's, Jonah Jones, Adel, Ross Colvin, Daniel Wallis Organizations: Volunteers, REUTERS, DES, Trump, Iowa Republican Party, Sunday Trump, Drake University, Reuters, DeSantis, Hawkeye State, Ipsos, Iowa, Christian, Republican, Thomson Locations: Iowa, Urbandale , Iowa, U.S, , Iowa, Sioux City, Florida, Cruz, Adel, Des Moines, Clive , Iowa, Adel , Iowa