Began the process of withdrawing the U.S. — the WHO's largest funder — from the organization and halting related funding.
Signed Inauguration Day; withdrawal requires one year's notice under the terms of U.S. membership.
Positive impactcontested
Supporters cite WHO's COVID-era failures and reform needs.
The administration cited mismanagement and undue influence by member states as justification.
Negative impactsubstantiated
Removes the WHO's single largest funder and the U.S. seat at the table.
The U.S. had provided the largest share of the WHO's budget, so withdrawal removes major funding and U.S. influence over global health governance — a documented consequence, not a both-sides dispute.
Negative impactprojected
Public-health experts project weakened global pandemic surveillance.
Groups warned that reduced U.S. participation and funding would slow disease monitoring and outbreak response; the size of that effect is a forecast.