How key Republican senators are responding to Trump allies' primary threats Sen. Joni Ernst, R-Iowa, listens at the Senate Homeland Security and Governmental Affairs Committee confirmation hearing for South Dakota Gov. Kristi Noem, President-elect Donald Trump's nominee to be Secretary of Homeland Security, at the Capitol in Washington, Friday, Jan. 17, 2025. (AP Photo/Susan Walsh)
Sen. Thom Tillis, R-N.C., speaks at the Senate Judiciary Committee confirmation hearing for Pam Bondi, President-elect Donald Trump's choice to lead the Justice Department as attorney general, at the Capitol in Washington, Wednesday, Jan. 15, 2025. (AP Photo/Ben Curtis)
Sen. Bill Cassidy, R-La., left, speaks as Sen. James Lankford, R-Okla., right, listens at the Senate Finance Committee confirmation hearing for Scott Bessent, President-elect Donald Trump's choice to be Secretary of the Treasury, at the Capitol in Washington, Thursday, Jan. 16, 2025. (AP Photo/Ben Curtis)
Sen. John Cornyn, R-Texas, introduces Brooke Rollins during a Senate Agriculture, Nutrition, and Forestry Committee hearing on her nomination for Secretary of Agriculture, Thursday, Jan. 23, 2025, in Washington. (AP Photo/Jacquelyn Martin)
Senate Budget Committee Chair Sen. Lindsey Graham, R-S.C., attends a hearing on the nomination of Russell Vought, President Donald Trump's choice for Director of the Office of Management and Budget, on Capitol Hill in Washington, Wednesday, Jan. 22, 2025. (AP Photo/Jacquelyn Martin)
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Sen. Joni Ernst, R-Iowa, listens at the Senate Homeland Security and Governmental Affairs Committee confirmation hearing for South Dakota Gov. Kristi Noem, President-elect Donald Trump's nominee to be Secretary of Homeland Security, at the Capitol in Washington, Friday, Jan. 17, 2025. (AP Photo/Susan Walsh)