FILE - President Donald Trump attends the White House Correspondents' Association Dinner, at the Waldorf Astoria Washington DC, July 24, 2026, in Washington, with White House press secretary Karoline Leavitt. (AP Photo/Rod Lamkey, Jr., File)

FILE - Press Secretary Karoline Leavitt glances at President Donald Trump before departing on Marine One from the South Lawn of the White House, Feb. 27, 2026, in Washington. (AP Photo/Tom Brenner, File)

A sign about childhood vaccines is pictured as President Donald Trump speaks during a meeting to sign an executive order, Monday, Aug. 10, 2026, in the Oval Office of the White House in Washington. (AP Photo/Jacquelyn Martin)

President Donald Trump speaks as Stephen Miller, White House deputy chief of staff, from left, National Institutes of Health Director Dr. Jay Bhattacharya, Jayme Franklin, Health and Human Services Secretary Robert F. Kennedy Jr. and Heidi Overton, deputy director of the White House Domestic Policy Council, listen during a meeting to sign an executive order about vaccines, Monday, Aug. 10, 2026, in the Oval Office of the White House in Washington. (AP Photo/Jacquelyn Martin)

President Donald Trump speaks as Health and Human Services Secretary Robert F. Kennedy Jr., right, and Jayme Franklin listen during a meeting to sign an executive order about vaccines, Monday, Aug. 10, 2026, in the Oval Office of the White House in Washington. (AP Photo/Jacquelyn Martin)

President Donald Trump meets with Iraq's Prime Minister Ali al-Zaidi in the Oval Office of the White House, Tuesday, July 14, 2026, in Washington. (AP Photo/Julia Demaree Nikhinson)

President Donald Trump, left, shakes the hand of Health and Human Services Secretary Robert F. Kennedy Jr. during a meeting to sign an executive order about vaccines, Monday, Aug. 10, 2026, in the Oval Office of the White House in Washington. (AP Photo/Jacquelyn Martin)

Health and Human Services Secretary Robert F. Kennedy Jr. holds an executive order about vaccines signed by President Donald Trump during a meeting, Monday, Aug. 10, 2026, in the Oval Office of the White House in Washington. (AP Photo/Jacquelyn Martin)