Discussion of some major issues, such as climate change, will take place outside the core group of industrialized democracies.
There are widespread concerns that Taliban defectors will join growing terrorist group.
The two sides are close to agreement on an initial withdrawal in exchange for concessions by the militants and wider peace negotiations, officials said.
Staffers in one department bureau were accused of political disloyalty to Trump administration.
The move leaves a vacancy in the top office in charge of the Trump administration’s efforts to control immigration and build ties with Latin America.
The agreement appeared to avert an imminent Turkish military offensive.
National security adviser John Bolton warns supporters of the Maduro regime: “Do not double down on a bad bet.”
The move represents a significant escalation against Maduro’s socialist government.
Syrian Kurds are preparing for battle and warned that thousands of Islamic State fighters could break out of prison.
The incident marks one of a limited number of times in which the United States has struck out directly at forces loyal to Syrian President Bashar al-Assad.