Trump strongly rejects international cooperation. Round 2 is underway.
Here's a timeline of Trump's actions involving international organizations and treaties, from his first term to the present.
World Health Organization (WHO)
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WEF says Trump to join Davos virtually after retaking White House
Børge Brende, WEF's president, said there is "a greater level of global uncertainty than we have seen in a generation."
Pandemic treaty talks are in high gear (again). There's a tight deadline.
Negotiators have until next year to try for a deal in WHO's decision-making body, but aim for a special session this year.
U.N. official: 'The entire population of North Gaza is at risk of dying'
Hospitals are attacked, health care workers detained, and men and boys are rounded up by Israeli forces in northern Gaza.
Summit clinches $1 billion for U.N. health agency's funding gap
WHO says it needs $11.1 billion for its core work over the next four years, but has only $4 billion in projected income.
The war in Gaza is permanently disabling thousands of children
For disabled kids and their families, navigating forced displacements amid the rubble is a life-or-death challenge.
WHO chief sees chance of finishing pandemic treaty talks by end of year
If an agreement is reached before the end of the year, the World Health Assembly would need to meet in December.
Teams deliver polio vaccine to more than half a million children in Gaza
The original target for the campaign was 640,000 children, which may have been an overestimate due to the war.
Bleak outlook for international organizations if Trump returns
Global cooperation on health, defense, climate change and more would be at risk under a second Trump presidency.
WHO's new global guidance takes aim at antimicrobial resistance
The guidance comes weeks before the U.N. General Assembly takes up the issue of AMR at its high-level meeting this month.
WHO's global mpox plan won't cover at least $100M in vaccine costs
The U.N. health agency's $135 million mpox plan covers mainly 'international support to national mpox responses.'
WHO declares spread of mpox in Africa a global health emergency
Alarmed at the spread of a new variant, the U.N. health agency's move follows an previous one that ended last year.
Africa CDC declares mpox surge its first continental health emergency
WHO will convene an emergency panel to determine if the mpox outbreak in Africa is a global public health emergency.
Envoy to Yemen tells U.N. Security Council of a new 'path to de-escalate'
The U.N. secretary-general's special envoy for Yemen said regional dangers grew but the warring parties are talking.
Heat, drought and death: A deadly combination around the globe
The effects of climate change hit hard from the bombed streets of Gaza to the glitzy venues of the Paris Olympics.
War may cause 'irreversible' damage to Gaza's environment and health
Building debris may take $647 million and 15 years to clean up. Around 800,000 tons might qualify as hazardous waste.