Supporters wait for former U.S. President and Republican presidential candidate Donald Trump to arrive for a South Dakota Republican party rally in Rapid City, South Dakota, U.S. September 8, 2023. REUTERS/Jonathan Ernst TPX IMAGES OF THE DAY

Republican presidential candidate and former U.S. Vice President Mike Pence waits back stage before speaking with NewsNation anchor Leland Vittert for a town hall event at NewsNation's headquarters in Chicago, Illinois, U.S., September 13, 2023. REUTERS/Jim Vondruska

Supporters of former U.S. President and Republican presidential candidate Donald Trump gather ahead of a South Dakota Republican party rally in Rapid City, South Dakota, U.S., September 8, 2023. REUTERS/Jonathan Ernst

Republican presidential candidate and former U.S. Vice President Mike Pence meets with attendees during the annual Labor Day Picnic hosted by the Salem Republican Town Committee in Salem, New Hampshire, U.S., September 4, 2023. REUTERS/Elizabeth Frantz

Republican presidential candidate and former Arkansas Governor Asa Hutchinson greets an attendee during the annual Labor Day Picnic hosted by the Salem Republican Town Committee in Salem, New Hampshire, U.S., September 4, 2023. REUTERS/Elizabeth Frantz

A sign supporting Republican presidential candidate and former U.S. President Donald Trump, reading "Take America Back 2024", stands in Newport, New Hampshire, U.S., September 5, 2023. REUTERS/Brian Snyder

Former U.S. President and Republican presidential candidate Donald Trump reacts at a South Dakota Republican party rally in Rapid City, South Dakota, U.S. September 8, 2023. REUTERS/Jonathan Ernst TPX IMAGES OF THE DAY

Republican presidential candidate and former U.S. Ambassador to the United Nations Nikki Haley recites the U.S. pledge of allegiance during a campaign town hall meeting in Claremont, New Hampshire, U.S., September 5, 2023. REUTERS/Brian Snyder

People attend the annual Labor Day Picnic hosted by the Salem Republican Town Committee in Salem, New Hampshire, U.S., September 4, 2023. REUTERS/Elizabeth Frantz

Republican presidential candidate and former biotech executive Vivek Ramaswamy holds up a drawing given to him by a child during the annual Labor Day Picnic hosted by the Salem Republican Town Committee in Salem, New Hampshire, U.S., September 4, 2023. REUTERS/Elizabeth Frantz

Republican presidential candidate and former U.S. Ambassador to the United Nations Nikki Haley greets an audience member after speaking during a campaign stop at a Rotary Club meeting in Greenland, New Hampshire, U.S., September 21, 2023. REUTERS/Brian Snyder

Republican presidential candidate and former U.S. Ambassador to the United Nations Nikki Haley is interviewed by Reuters in front of portraits of past U.S. Presidents before a Moms for Liberty campaign town hall event at the Founders Academy charter school in Manchester, New Hampshire, U.S., September 6, 2023. REUTERS/Brian Snyder

Republican presidential candidate and former biotech executive Vivek Ramaswamy and his wife Apoorva greet the crowd during the annual Labor Day Picnic hosted by the Salem Republican Town Committee in Salem, New Hampshire, U.S., September 4, 2023. REUTERS/Elizabeth Frantz