IOWA CAUCUSESDonald Trump visits the Iowa State Fair as he campaigns for presidentDes Moines RegisterRepublican presidential candidate former President Donald Trump greets supporters at the Iowa Pork Producers tent during a visit to the Iowa State Fair, Saturday, Aug. 12, 2023, in Des Moines, Iowa. (AP Photo/Charlie Neibergall)Charlie Neibergall, APRepublican presidential candidate former President Donald Trump reacts as he speaks to supporters during a visit to the Iowa State Fair, Saturday, Aug. 12, 2023, in Des Moines, Iowa. (AP Photo/Charlie Neibergall)Charlie Neibergall, APRepublican presidential candidate former President Donald Trump waves to supporters at the Iowa Pork Producers tent during a visit to the Iowa State Fair, Saturday, Aug. 12, 2023, in Des Moines, Iowa. (AP Photo/Charlie Neibergall)Charlie Neibergall, APRepublican presidential candidate former President Donald Trump visits the Iowa State Fair, Saturday, Aug. 12, 2023, in Des Moines, Iowa. (AP Photo/Charlie Neibergall)Charlie Neibergall, APRepublican presidential candidate former President Donald Trump reacts as he greets supporters during a visit to the Iowa State Fair, Saturday, Aug. 12, 2023, in Des Moines, Iowa. (AP Photo/Charlie Neibergall)Charlie Neibergall, APRepublican presidential candidate former President Donald Trump greets former acting U.S. Attorney General Matthew Whitaker during a visit to the Iowa State Fair, Saturday, Aug. 12, 2023, in Des Moines, Iowa. (AP Photo/Charlie Neibergall)Charlie Neibergall, APRepublican presidential candidate former President Donald Trump waves to supporters as he boards his plane after a visit to the Iowa State Fair, Saturday, Aug. 12, 2023, in Des Moines, Iowa. (AP Photo/Charlie Neibergall)Charlie Neibergall, APRepublican presidential candidate former President Donald Trump greets Travis Klinefelter, of Dubuque, Iowa, at the Des Moines International Airport after a visit to the Iowa State Fair, Saturday, Aug. 12, 2023, in Des Moines, Iowa. (AP Photo/Charlie Neibergall)Charlie Neibergall, AP