Health and Human Services Secretary Robert F. Kennedy Jr. speaks 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 listens 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. speaks as President Donald Trump listens 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 holds up an image taken from his Truth Social account as Health and Human Services Secretary Robert F. Kennedy Jr. watches 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)

FILE - A member of the Mississippi National Guard walks among the cherry blossom trees along the tidal basin on the National Mall on Thursday, March 26, 2026, in Washington. (AP Photo/Tom Brenner, File)

FILE - Demonstrators protest against President Donald Trump's deployment of federal law enforcement and National Guard troops during a march, Sept. 6, 2025, in Washington. (AP Photo/Jose Luis Magana, File)

FILE - Members of the Florida National Guard pass by people on a sidewalk, April 17, 2026, in Washington. (AP Photo/Jacquelyn Martin, File)

FILE - National Guard members gather near a large portrait of President Donald Trump on the Labor Department headquarters before the body of Metropolitan Police Department officer Terry Bennett is driven past the Capitol, Jan. 8, 2026, in Washington. (AP Photo/Mark Schiefelbein, File)