During the deliberations, some American delegates even suggested the United States might cut its contribution the W.H.O., several negotiators said.
Washington is the single largest contributor to the health organization, providing $845 million, or roughly 15 percent of its budget, last year.
The confrontation was the latest example of the Trump administration siding with corporate interests on numerous public health and environmental issues.
During the same Geneva meeting where the breast-feeding resolution was debated, the United States succeeded in removing statements supporting soda taxes from a document that advises countries grappling with soaring rates of obesity.
The Americans also sought, unsuccessfully, to thwart a W.H.O. effort aimed at helping poor countries obtain access to lifesaving medicines.
Washington, supporting the pharmaceutical industry, has long resisted calls to modify patent laws as a way of increasing drug availability in the developing world, but health advocates say the Trump administration has ratcheted up its opposition to such efforts.
The delegation’s actions in Geneva are in keeping with the tactics of an administration that has been upending alliances and long-established practices across a range of multilateral organizations, from the Paris climate accord to the Iran nuclear deal to Nafta. »