Speech given by Admiral Philip Davidson, Commander of the  U.S. Indo-Pacific Command, at the Future of Diplomacy Project's event on "China's Challenge to a Free and Open Indo-Pacific" at the Harvard Kennedy School 

President Trump’s decision to release the contents of his July call with Ukraine’s Volodymyr Zelensky has set a precedent his administration will have trouble containing.

More than 300 former national security officials have come out in support of an impeachment inquiry into Donald Trump, arguing the President’s actions in regard to Ukraine are a “profound national security concern.”

NPR's Audie Cornish talks with Nicholas Burns about a letter signed by more than 300 national security professionals saying Trump's actions constitute "an unconscionable abuse of power."

Nicholas Burns, former US Ambassador to NATO and Greece, says American foreign policy has been "turned on its head" this week. How could national security be impacted by an impeachment inquiry of President Trump?

The United States looks to Greece to “maintain stability” in the Eastern Mediterranean, former American ambassador to Greece Nicholas Burns tells Kathimerini in an interview. He adds that following the Prespes agreement, there are now no more obstacles blocking Greece from expanding its role in Southeastern Europe. At the same time, he notes that Turkey has become a “major headache” for Washington.

Ambassador Nicholas Burns speaks to CNN's Jim Sciutto about the Iran crisis.

Trump's critics say that lack of success means the president is going to the United Nations in a weakened position.

When the July 24 congressional testimony of special counsel Robert S. Mueller III deflated the impeachment hopes of Democrats, President Trump crowed “no collusion” and claimed vindication from accusations that he had conspired with Russia in the 2016 election.

President Trump is rejecting reports that the intelligence community’s whistleblower complaint involved a phone conversation with the Ukrainian President.