| Supporters listen as Republican presidential candidate Florida Gov. Ron DeSantis speaks during a campaign event at The Grass Wagon in Council Bluffs, Iowa, Jan. 13. AFP-Yonhap |
| Iowa Caucus information is displayed at the Prairie Meadows Hotel and Convention Center in Altoona, Iowa, Jan. 11. Reuters-Yonhap |
| A volunteer puts campaign signs on chairs before the arrival of Republican presidential candidate former U.N. Ambassador Nikki Haley at a campaign event in Cedar Rapids, Iowa, Jan. 11. AP-Yonhap |
| Merchants set hats and other merchandise ahead of Donald Trump Jr. addressing an event hosted by the Bull Moose Club at The Machine Shed restaurant in Urbandale, Iowa, Jan. 11. AFP-Yonhap |
| A tractor decorated to show support for Republican presidential candidate former President Donald Trump is displayed outside the Machine Shed after Donald Trump Jr. speaks in Urbandale, Iowa, Jan. 11. AP-Yonhap |
| Workers take down the stage after a commit-to-caucus event for Republican presidential candidate Vivek Ramaswamy at the National Czech and Slovak Museum & Library in Cedar Rapids, Iowa, Jan. 11. AP-Yonhap |
| Republican presidential candidate Vivek Ramaswamy, left, and conservative commentator Candace Owens address audience questions during a commit-to-caucus event at the National Czech and Slovak Museum & Library in Cedar Rapids, Iowa, Jan. 11. AP-Yonhap |
| Republican presidential candidate former U.N. Ambassador Nikki Haley arrives at a campaign event at The Bread Board in Pella, Iowa, Jan. 15. AP-Yonhap |
| Florida Gov. Ron DeSantis samples praline pecan before ordering a cone at the Blue Bunny Ice Cream Parlor in LeMars, Iowa, Jan. 12. AP-Yonhap |
| Republican presidential candidate Vivek Ramaswamy is seen in a mirror as he speaks during a campaign stop at Chad's Pizza and Restaurant in Grundy Center, Iowa, Jan. 11. AFP-Yonhap |
| Supporters wait for former President Donald Trump to arrive at a commit-to-caucus rally in Clinton, Iowa, Jan. 6. AP-Yonhap |
| A tree stump is painted with an image of former President Donald Trump in Des Moines, Iowa, Jan. 11. EPA-Yonhap |
| Isaac Hammond of Grinnell braves the sub-zero weather for caucus night in Malcolm, Iowa, Jan. 15. AP-Yonhap |
| Republican presidential candidate former President Donald Trump participates in a virtual rally at Hotel Fort Des Moines in Des Moines, Iowa, Jan. 13. AP-Yonhap |
| Dave Brommel, a supporter of Republican presidential candidate and former U.S. President Donald Trump, poses for a portrait during breakfast in a cafe in Des Moines, Iowa, Jan. 13. Reuters-Yonhap |
| People listen as Republican presidential candidate former President Donald Trump speaks to volunteers at Hotel Fort Des Moines in Des Moines, Iowa, Jan. 14. AP-Yonhap |
| Republican presidential candidate former President Donald Trump delivers pizzas to firefighters at Waukee Fire Department in Waukee, Iowa, Jan. 14. AP-Yonhap |
| Republican presidential candidate former President Donald Trump arrives to speak at a rally at Simpson College in Indianola, Iowa, Jan. 14. AP-Yonhap |
| Supporters of former U.S. President Donald Trump, a Republican presidential candidate, attend a commit-to-caucus event at a whiskey bar in Ankeny, Iowa, Dec. 2, 2023. Reuters-Yonhap |
| Supporters of former U.S. President Donald Trump, a Republican presidential candidate, gather for an Iowa caucus night watch party in Des Moines, Iowa, Jan. 15. Reuters-Yonhap |
| Ballots are stacked on a desk after being counted by Republican caucus officials in West Des Moines, Iowa, Jan. 15. AFP-Yonhap |
| Nick Hopkins wears a hat that reads 'Trump Caucus Captain' on the day of the Republican presidential caucus in West Des Moines, Iowa, Jan. 15. Reuters-Yonhap |