The impeachment sits at a pivotal juncture as Republicans lack the votes to block witnesses and face a setback in their hope of ending the trial with a quick acquittal.
State Department official to testify that John Bolton cautioned him that Rudy Giuliani "was a key voice with the president on Ukraine."
War with Iran: Some Iranians say they feel hemmed in all sides and see various forces eager to stoke tensions that could lead to conflict.
As President Trump dials down the rhetoric on Iran, the United States has stepped up pressure on a different front in recent days: Europe.
John Bolton said there was "no reason" for Iran to back out of its nuclear deal with world powers other than to seek atomic weapons.
North Korea called John Bolton a "warmonger" after he described tests of short-range missiles as a violation of U.N. Security Council resolutions.
As national security adviser to President Trump, John Bolton has been the chief translator of Trump's unorthodox foreign policy views to the vast U.S. bureaucracy.
Saudi Crown Prince Reportedly Described Jamal Khashoggi As Dangerous Extremist In Phone Call With Jared Kushner
The Saudi Prince reportedly accused Khashoggi of being a dangerous extremist in a phone call with Jared Kushner and national security adviser John Bolton.
The Trump administration is "very, very early in the process of considering" what it wants to do about the main existing arms control treaty between the United States and Russia.