The ouster of national security adviser John Bolton again highlights the large number of vacancies at the top levels of the Trump administration.

As Trump looks for his fourth national security adviser, Juliette Kayyem wonders if anything will improve.

The Trump administration ordered the Census Bureau to produce citizenship data state officials can use when redrawing voting districts. But the bureau says no state officials asked for that data.

In a proclamation marking the anniversary as "Patriot Day," Trump reflected on how many Americans recall the moment when the terror group conducted the largest attack on American soil, killing nearly 3,000 people.

A foreign policy and national security whirlwind in Washington has scrambled the outlook for U.S. policy on Afghanistan, Iran, North Korea, Russia and more.

CNN's John King says differences of opinion led to the national security adviser's resignation.

The national security adviser caught the president's attention for his aggressive stance as a Fox News commentator but strayed from favor after pushing too hard against Trump's wishes.

It "was not based on science but on external factors including reputation and appearance, or simply put, political," the agency's acting chief scientist wrote.

The Secretary of State was on the Sunday news talk shows a day after Trump tweeted that a secret meeting to be held at Camp David between leaders of Afghanistan at the Taliban was canceled.

President Trump says the Taliban admitted to an attack in Kabul that killed an American soldier, so he canceled a planned meeting at Camp David.