The new Trump foreign policy team has brought a dizzying message to European allies on A.I., Ukraine and more. It has already left many angered and chagrined.

The collapse of U.S.A.I.D. at the hands of President Trump and Elon Musk is already leaving gaping holes in vital health care and other services that millions of Africans rely on for their survival.

Trump administration officials have misled about how the aid agency is spending its funding, in an effort to cite widespread “waste.”

A halt in foreign aid may undermine American organizations’ support for forces that guard the two largest camps holding Islamic State members and their families.

Many of the frozen programs are aimed at alleviating disease and malnutrition, but even security programs with U.S. funding are shutting down.

There were no Situation Room meetings and no quiet calls to de-escalate a dispute with an ally. Just threats, counterthreats, surrender and an indication of the president’s approach to Greenland and Panama.

Efforts to clear unexploded munitions in places like Iraq and Southeast Asia will stop for at least three months, according to a surprise announcement.

Many Latin American countries are trying to distance themselves from Beijing. But in response to President Trump’s sweeping deportation plans, Honduras is doing the opposite.

The plan, called “Mexico Embraces You,” seeks to reassure undocumented migrants facing expulsion. Some experts question if the government is really ready to reabsorb them.

The Florida senator becomes the United States’ 72nd chief diplomat, and the first Latino to hold the job.

The departures are common when a transition takes place, but it is now happening more quickly and on a larger scale than under previous administrations, a U.S. official said.

Ashley Moody, a Republican, would take the seat of Senator Marco Rubio once he is confirmed as President-elect Donald J. Trump’s secretary of state.

Mr. Rubio expressed views aligned with those of most senators who work on foreign policy, while taking care not to break from Donald J. Trump’s unorthodox ideas.

As the country’s top diplomat, Senator Marco Rubio of Florida, who has a special interest in Latin America, would be tasked with navigating Donald Trump’s efforts to expand U.S. influence.

Senator Marco Rubio, who is nominated for secretary of state, has a long history of personal and policy differences with President-elect Donald Trump.

The loose arrangement of hostile powers could pose a series of conundrums for President-elect Donald Trump’s pick for secretary of state.

Selections for attorney general, secretary of homeland security, secretary of state and Treasury secretary are among those set to have hearings this week.

When it comes to gas exports and competition with China, the two administrations share a similar vision, the top U.S. energy diplomat says.