Steak, beer and politics: 2020 Democrats descend on Iowa

Democratic presidential candidate Sen. Elizabeth Warren speaks during a house party, Friday, Sept. 20, 2019, in Mount Vernon, Iowa. (AP Photo/Charlie Neibergall)

Democratic presidential candidate former Vice President Joe Biden speaks during a town hall meeting at the Indian Creek Nature Preserve, Friday, Sept. 20, 2019, in Cedar Rapids, Iowa. (AP Photo/Charlie Neibergall)

DES MOINES, Iowa — When Barack Obama marched into the 2007 Iowa steak fry flanked by 1,000 supporters, skeptical Iowans were put on notice that he could win the caucus. A dozen years later, a new generation of Democratic White House hopefuls are looking to pull off a repeat performance to turbocharge their campaigns.

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