U.S. Republican presidential candidate and former U.S. Vice President Mike Pence, accompanied by his wife Karen Pence, speaks at the "Roast and Ride" event hosted by U.S. Senator Joni Ernst in Des Moines, Iowa, U.S. June 3, 2023. REUTERS/Dave Kaup TPX IMAGES OF THE DAY

Iowa residents listen as Florida Governor Ron Desantis talks on his second day of campaigning as an official candidate for the 2024 U.S. Republican presidential nomination, at Sun Valley Barn in Pella, Iowa, U.S. May 31, 2023. REUTERS/Scott Morgan

Florida Governor Ron Desantis hands 14-month-old Lindly back to her mother Madi King of Newton, Iowa, after being handed the child at a campaign event on his second day of campaigning as an official candidate for the 2024 U.S. Republican presidential nomination, at Sun Valley Barn in Pella, Iowa, U.S. May 31, 2023. REUTERS/Scott Morgan

A security staffer checks arriving guests' bodies with a magnetometer for possible weapons before the start of a U.S. presidential campaign event with Florida Governor Ron Desantis on his second day of campaigning as an official candidate for the 2024 U.S. Republican presidential nomination at Sun Valley Barn in Pella, Iowa, U.S. May 31, 2023. REUTERS/Scott Morgan

Florida Governor Ron Desantis reacts as he embraces an Iowa resident on his second day of campaigning as an official candidate for the 2024 U.S. Republican presidential nomination, at Sun Valley Barn in Pella, Iowa, U.S. May 31, 2023. REUTERS/Scott Morgan

U.S. Senator Joni Ernst, Republican presidential candidate and Florida Governor Ron DeSantis and his wife Casey attend the "Roast and Ride" event hosted by Senator Ernst in Des Moines, Iowa, U.S. June 3, 2023. REUTERS/Dave Kaup

U.S. Republican presidential campaign gadgets can be seen at the "Roast and Ride" event hosted by U.S. Senator Joni Ernst in Des Moines, Iowa, U.S. June 3, 2023. REUTERS/Dave Kaup

Florida Governor Ron Desantis addresses a crowd of supporters and Iowa voters as he kicks off his campaign for the 2024 Republican U.S. presidential nomination with an evening campaign rally at the evangelical Eternity church in West Des Moines, Iowa, U.S. May 30, 2023. REUTERS/Scott Morgan

People ride motorcycles at the "Roast and Ride" event hosted by U.S. Senator Joni Ernst in Des Moines, Iowa, U.S. June 3, 2023. REUTERS/Dave Kaup

A person stands next to a pick-up truck at the "Roast and Ride" event hosted by U.S. Senator Joni Ernst while campaigning in Des Moines, Iowa, U.S. June 3, 2023. REUTERS/Dave Kaup

U.S. Republican presidential candidate Tim Scott speaks at the "Roast and Ride" event hosted by U.S. Senator Joni Ernst while campaigning in Des Moines, Iowa, U.S. June 3, 2023. REUTERS/Dave Kaup

U.S. Republican presidential candidate Vivek Ramaswamy and U.S. Senator Joni Ernst attend the "Roast and Ride" event hosted by Senator Ernst in Des Moines, Iowa, U.S. June 3, 2023. REUTERS/Dave Kaup

Motorcyclists, including first on the left U.S. Republican presidential candidate and former U.S. Vice President Mike Pence and first on the right U.S. Senator Joni Ernst, ride during the "Roast and Ride" event hosted by Senator Ernst in Des Moines, Iowa, U.S. June 3, 2023. REUTERS/Dave Kaup

U.S. Republican presidential candidate and Florida Governor Ron DeSantis holds his son Mason as he attends the "Roast and Ride" event hosted by U.S. Senator Joni Ernst while campaigning in Des Moines, Iowa, U.S. June 3, 2023. REUTERS/Dave Kaup