

09212019 - Des Moines, Iowa USA: Candidate for the Democratic nomination for President of the United States Bernie Sanders speaks during the Polk County Steak Fry, Saturday, September 21, 2019 at Water Works Park in Des Moines, Iowa. The steak fry was the largest in Iowa's history and was attended by 12,000 Democrats from around Iowa. The event drew in 17 candidates for the democratic nomination for president of the United States. The Iowa Caucasus are Monday, February 3, 2020 and although not a primary will narrow down the field of candidates for president before the first election primary in the state of New Hampshire. (Jeremy Hogan/Polaris)

09212019 - Des Moines, Iowa USA: A Kamala Harris supporter wears a patriotic hat during the Polk County Steak Fry, Saturday, September 21, 2019 at Water Works Park in Des Moines, Iowa. The steak fry was the largest in Iowa's history and was attended by 12,000 Democrats from around Iowa. The event drew in 17 candidates for the democratic nomination for president of the United States. The Iowa Caucasus are Monday, February 3, 2020 and although not a primary will narrow down the field of candidates for president before the first election primary in the state of New Hampshire. (Jeremy Hogan/Polaris)

09212019 - Des Moines, Iowa USA: Democrats are soaked during by heavy rain while listening to candidates during the Polk County Steak Fry, Saturday, September 21, 2019 at Water Works Park in Des Moines, Iowa. The steak fry was the largest in Iowa's history and was attended by 12,000 Democrats from around Iowa. The event drew in 17 candidates for the democratic nomination for president of the United States. The Iowa Caucasus are Monday, February 3, 2020 and although not a primary will narrow down the field of candidates for president before the first election primary in the state of New Hampshire. (Jeremy Hogan/Polaris)

09212019 - Des Moines, Iowa USA: Democrats are soaked during by heavy rain while listening to candidates during the Polk County Steak Fry, Saturday, September 21, 2019 at Water Works Park in Des Moines, Iowa. The steak fry was the largest in Iowa's history and was attended by 12,000 Democrats from around Iowa. The event drew in 17 candidates for the democratic nomination for president of the United States. The Iowa Caucasus are Monday, February 3, 2020 and although not a primary will narrow down the field of candidates for president before the first election primary in the state of New Hampshire. (Jeremy Hogan/Polaris)

09212019 - Des Moines, Iowa USA: A woman walks past the American flag in the rain during the Polk County Steak Fry, Saturday, September 21, 2019 at Water Works Park in Des Moines, Iowa. The steak fry was the largest in Iowa's history and was attended by 12,000 Democrats from around Iowa. The event drew in 17 candidates for the democratic nomination for president of the United States. The Iowa Caucasus are Monday, February 3, 2020 and although not a primary will narrow down the field of candidates for president before the first election primary in the state of New Hampshire. (Jeremy Hogan/Polaris)

09212019 - Des Moines, Iowa USA: A Beto O'Rourke supporter stands in the rain during the Polk County Steak Fry, Saturday, September 21, 2019 at Water Works Park in Des Moines, Iowa. The steak fry was the largest in Iowa's history and was attended by 12,000 Democrats from around Iowa. The event drew in 17 candidates for the democratic nomination for president of the United States. The Iowa Caucasus are Monday, February 3, 2020 and although not a primary will narrow down the field of candidates for president before the first election primary in the state of New Hampshire. (Jeremy Hogan/Polaris)

09212019 - Des Moines, Iowa USA: Standing in the rain, Marrianne Williamson poses for a photo with a supporter after speaking during the Polk County Steak Fry, Saturday, September 21, 2019 at Water Works Park in Des Moines, Iowa. The steak fry was the largest in Iowa's history and was attended by 12,000 Democrats from around Iowa. The event drew in 17 candidates for the democratic nomination for president of the United States. The Iowa Caucasus are Monday, February 3, 2020 and although not a primary will narrow down the field of candidates for president before the first election primary in the state of New Hampshire. (Jeremy Hogan/Polaris)

09212019 - Des Moines, Iowa USA: Cory Booker, left, speaks on MSNBC saying he needs to raise more money to stay in the presidential race during the Polk County Steak Fry, Saturday, September 21, 2019 at Water Works Park in Des Moines, Iowa. The steak fry was the largest in Iowa's history and was attended by 12,000 Democrats from around Iowa. The event drew in 17 candidates for the democratic nomination for president of the United States. The Iowa Caucasus are Monday, February 3, 2020 and although not a primary will narrow down the field of candidates for president before the first election primary in the state of New Hampshire. (Jeremy Hogan/Polaris)

09212019 - Des Moines, Iowa USA: Campaign signs are seen lining a road during the Polk County Steak Fry, Saturday, September 21, 2019 at Water Works Park in Des Moines, Iowa. The steak fry was the largest in Iowa's history and was attended by 12,000 Democrats from around Iowa. The event drew in 17 candidates for the democratic nomination for president of the United States. The Iowa Caucasus are Monday, February 3, 2020 and although not a primary will narrow down the field of candidates for president before the first election primary in the state of New Hampshire. (Jeremy Hogan/Polaris)

09212019 - Des Moines, Iowa USA: Elizabeth Warren supporters wait to take selfies with the candidate during the Polk County Steak Fry, Saturday, September 21, 2019 at Water Works Park in Des Moines, Iowa. The steak fry was the largest in Iowa's history and was attended by 12,000 Democrats from around Iowa. The event drew in 17 candidates for the democratic nomination for president of the United States. The Iowa Caucasus are Monday, February 3, 2020 and although not a primary will narrow down the field of candidates for president before the first election primary in the state of New Hampshire. (Jeremy Hogan/Polaris)

09212019 - Des Moines, Iowa USA: A girl jumps into the air with a balloon during the Polk County Steak Fry, Saturday, September 21, 2019 at Water Works Park in Des Moines, Iowa. The steak fry was the largest in Iowa's history and was attended by 12,000 Democrats from around Iowa. The event drew in 17 candidates for the democratic nomination for president of the United States. The Iowa Caucasus are Monday, February 3, 2020 and although not a primary will narrow down the field of candidates for president before the first election primary in the state of New Hampshire. (Jeremy Hogan/Polaris)

09212019 - Des Moines, Iowa USA: An American flag sticker is discarded with a plate that was used to eat steak during the Polk County Steak Fry, Saturday, September 21, 2019 at Water Works Park in Des Moines, Iowa. The steak fry was the largest in Iowa's history and was attended by 12,000 Democrats from around Iowa. The event drew in 17 candidates for the democratic nomination for president of the United States. The Iowa Caucasus are Monday, February 3, 2020 and although not a primary will narrow down the field of candidates for president before the first election primary in the state of New Hampshire. (Jeremy Hogan/Polaris)

09212019 - Des Moines, Iowa USA: A crowd gathers during the Polk County Steak Fry, Saturday, September 21, 2019 at Water Works Park in Des Moines, Iowa. The steak fry was the largest in Iowa's history and was attended by 12,000 Democrats from around Iowa. The event drew in 17 candidates for the democratic nomination for president of the United States. The Iowa Caucasus are Monday, February 3, 2020 and although not a primary will narrow down the field of candidates for president before the first election primary in the state of New Hampshire. (Jeremy Hogan/Polaris)

09212019 - Des Moines, Iowa USA: Candidate for the Democratic nomination for President of the United States Pete Buttigieg greets his supporters after speaking during the Polk County Steak Fry, Saturday, September 21, 2019 at Water Works Park in Des Moines, Iowa. The steak fry was the largest in Iowa's history and was attended by 12,000 Democrats from around Iowa. The event drew in 17 candidates for the democratic nomination for president of the United States. The Iowa Caucasus are Monday, February 3, 2020 and although not a primary will narrow down the field of candidates for president before the first election primary in the state of New Hampshire. (Jeremy Hogan/Polaris)

09212019 - Des Moines, Iowa USA: Candidate for the Democratic nomination for President of the United States Pete Buttigieg speaks during the Polk County Steak Fry, Saturday, September 21, 2019 at Water Works Park in Des Moines, Iowa. The steak fry was the largest in Iowa's history and was attended by 12,000 Democrats from around Iowa. The event drew in 17 candidates for the democratic nomination for president of the United States. The Iowa Caucasus are Monday, February 3, 2020 and although not a primary will narrow down the field of candidates for president before the first election primary in the state of New Hampshire. (Jeremy Hogan/Polaris)

09212019 - Des Moines, Iowa USA: Candidate for the Democratic nomination for President of the United States Joe Biden greets supporters after speaking during the Polk County Steak Fry, Saturday, September 21, 2019 at Water Works Park in Des Moines, Iowa. The steak fry was the largest in Iowa's history and was attended by 12,000 Democrats from around Iowa. The event drew in 17 candidates for the democratic nomination for president of the United States. The Iowa Caucasus are Monday, February 3, 2020 and although not a primary will narrow down the field of candidates for president before the first election primary in the state of New Hampshire. (Jeremy Hogan/Polaris)

09212019 - Des Moines, Iowa USA: An Elizabeth Warren supporter listens as Warren speaks during the Polk County Steak Fry, Saturday, September 21, 2019 at Water Works Park in Des Moines, Iowa. The steak fry was the largest in Iowa's history and was attended by 12,000 Democrats from around Iowa. The event drew in 17 candidates for the democratic nomination for president of the United States. The Iowa Caucasus are Monday, February 3, 2020 and although not a primary will narrow down the field of candidates for president before the first election primary in the state of New Hampshire. (Jeremy Hogan/Polaris)

09212019 - Des Moines, Iowa USA: Candidate for the Democratic nomination for President of the United States Bernie Sanders speaks during the Polk County Steak Fry, Saturday, September 21, 2019 at Water Works Park in Des Moines, Iowa. The steak fry was the largest in Iowa's history and was attended by 12,000 Democrats from around Iowa. The event drew in 17 candidates for the democratic nomination for president of the United States. The Iowa Caucasus are Monday, February 3, 2020 and although not a primary will narrow down the field of candidates for president before the first election primary in the state of New Hampshire. (Jeremy Hogan/Polaris)

09212019 - Des Moines, Iowa USA: Candidate for the Democratic nomination for President of the United States Elizabeth Warren speaks during the Polk County Steak Fry, Saturday, September 21, 2019 at Water Works Park in Des Moines, Iowa. The steak fry was the largest in Iowa's history and was attended by 12,000 Democrats from around Iowa. The event drew in 17 candidates for the democratic nomination for president of the United States. The Iowa Caucasus are Monday, February 3, 2020 and although not a primary will narrow down the field of candidates for president before the first election primary in the state of New Hampshire. (Jeremy Hogan/Polaris)

09212019 - Des Moines, Iowa USA: An Elizabeth Warren supporter listens as Warren speaks during the Polk County Steak Fry, Saturday, September 21, 2019 at Water Works Park in Des Moines, Iowa. The steak fry was the largest in Iowa's history and was attended by 12,000 Democrats from around Iowa. The event drew in 17 candidates for the democratic nomination for president of the United States. The Iowa Caucasus are Monday, February 3, 2020 and although not a primary will narrow down the field of candidates for president before the first election primary in the state of New Hampshire. (Jeremy Hogan/Polaris)

09212019 - Des Moines, Iowa USA: A little girl, who supports Elizabeth Warren, jumps in excitement as Warren takes the stage during the Polk County Steak Fry, Saturday, September 21, 2019 at Water Works Park in Des Moines, Iowa. The steak fry was the largest in Iowa's history and was attended by 12,000 Democrats from around Iowa. The event drew in 17 candidates for the democratic nomination for president of the United States. The Iowa Caucasus are Monday, February 3, 2020 and although not a primary will narrow down the field of candidates for president before the first election primary in the state of New Hampshire. (Jeremy Hogan/Polaris)

09212019 - Des Moines, Iowa USA: Candidate for the Democratic nomination for President of the United States Andrew Yang wears a pin reading, "Math," during the Polk County Steak Fry, Saturday, September 21, 2019 at Water Works Park in Des Moines, Iowa. The steak fry was the largest in Iowa's history and was attended by 12,000 Democrats from around Iowa. The event drew in 17 candidates for the democratic nomination for president of the United States. The Iowa Caucasus are Monday, February 3, 2020 and although not a primary will narrow down the field of candidates for president before the first election primary in the state of New Hampshire. (Jeremy Hogan/Polaris)

09212019 - Des Moines, Iowa USA: Kamala Harris supporters in costumes walk through the crowd during the Polk County Steak Fry, Saturday, September 21, 2019 at Water Works Park in Des Moines, Iowa. The steak fry was the largest in Iowa's history and was attended by 12,000 Democrats from around Iowa. The event drew in 17 candidates for the democratic nomination for president of the United States. The Iowa Caucasus are Monday, February 3, 2020 and although not a primary will narrow down the field of candidates for president before the first election primary in the state of New Hampshire. (Jeremy Hogan/Polaris)

09212019 - Des Moines, Iowa USA: Supporter speak to democratic candidate for President of the United States Kamala Harris during the Polk County Steak Fry, Saturday, September 21, 2019 at Water Works Park in Des Moines, Iowa. The steak fry was the largest in Iowa's history and was attended by 12,000 Democrats from around Iowa. The event drew in 17 candidates for the democratic nomination for president of the United States. The Iowa Caucasus are Monday, February 3, 2020 and although not a primary will narrow down the field of candidates for president before the first election primary in the state of New Hampshire. (Jeremy Hogan/Polaris)