Robert F. Kennedy Jr., President-elect Donald Trump's nominee to be secretary of Health and Human Services, arrives to meet with Sen. Markwayne Mullin, R-Okla., a member of the Senate Committee on Health, Education, Labor, and Pensions, at the Capitol in Washington, Monday, Dec. 16, 2024. (AP Photo/J. Scott Applewhite)

Sen. Marco Rubio, R-Fla., left, President-elect Trump's nominee to be secretary of State, is complimented by Sen. Lindsey Graham, R-S.C., the ranking member on the Senate Judiciary Committee, as they meet at the Capitol in Washington, Tuesday, Dec. 3, 2024. (AP Photo/J. Scott Applewhite)

Pete Hegseth, President-elect Donald Trump's choice to be defense secretary, arrives for a meeting with Sen. Susan Collins, R-Maine, on Capitol Hill, Wednesday, Dec. 11, 2024, in Washington. (AP Photo/Mark Schiefelbein)

Sen. Susan Collins, R-Maine, speaks with reporters after meeting with Pete Hegseth, President-elect Donald Trump's choice to be defense secretary, on Capitol Hill, Wednesday, Dec. 11, 2024, in Washington. (AP Photo/Mark Schiefelbein)

Tulsi Gabbard, President-elect Donald Trump's nominee to be director of National Intelligence, ight, meets with Sen. Mike Rounds, R-S.D., a member of the Senate Intelligence Committee, at the Capitol in Washington, Monday, Dec. 9, 2024. (AP Photo/J. Scott Applewhite)

Sen. Lisa Murkowski, R-Alaska, speaks during the U.S. Capitol Christmas tree lighting ceremony on the West Front of the Capitol, Tuesday, Dec. 3, 2024, in Washington. (AP Photo/Mark Schiefelbein)

Senate Minority Leader Mitch McConnell of Ky., left, wears a bandage on his face and wrist as he walks to cast a vote on the Senate floor after falling during a luncheon on Capitol Hill, Tuesday, Dec. 10, 2024, in Washington. (AP Photo/Mark Schiefelbein)

FILE - Sen. Joni Ernst, R-Iowa, talks after a policy luncheon on Capitol Hill, Sept. 24, 2024, in Washington. (AP Photo/Mariam Zuhaib, File)