Science   |  April 8, 2020

It is generally difficult, but not impossible, for a president to unilaterally withhold money that Congress has already appropriated for a specific purpose, such as funding WHO. But Rebecca Katz of Georgetown University, a health and security specialist who tracks funding of global health, says Trump could try to withhold future payments. Matthew Kavanagh, another global health expert at Georgetown, says the portion of the funding the United States contributes voluntarily could be particularly vulnerable.

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