President Donald Trump arrives on Marine One on the South Lawn of the White House, Friday, Oct. 2, 2026, in Washington. (AP Photo/Rod Lamkey, Jr.)

This image provided by Moderna in September 2026 shows packaging for the mFLUSIVA mRNA flu vaccine. (Moderna via AP)

This image provided by Moderna in September 2026 shows the mFLUSIVA mRNA flu vaccine. (Moderna via AP)

FILE - A view of the harbor on Catalina Island in Avalon, Calif, Saturday, April 18, 2020. (AP Photo/Chris Carlson, File)

FILE - Democratic U.S. senatorial candidate Adam Hamilton of Kansas, listens to administrators at the Health Partnership Clinic as they discuss funding issues the low-income family medical facility is facing on Wednesday, Aug. 12, 2026, in Olathe. Kan. (AP Photo/Colin E. Braley, File)

FILE - Sen. Roger Marshall, R-Kan., gestures as Vice President JD Vance speaks, Sept. 14, 2026, in Olathe, Kan. (AP Photo/Mark Schiefelbein, Pool, File)

FILE - North Carolina Republican Senate candidate Michael Whatley listens as President Donald Trump speaks, Sept. 16, 2026, in Gastonia, N.C. (AP Photo/Alex Brandon, File)

Tourist boats sit idle on sandbanks in the Arapiuns River near the Nova Sociedade community, near Santarem, Para state, Brazil, Thursday, Sept. 3, 2026. (AP Photo/Andre Penner)