John Bolton, Donald Trump's former national security adviser, warns Ukraine against making too many concessions in the peace negotiations. And says that Trump is being manipulated by Putin.

John Bolton was once Donald Trump's National Security Advisor before they had a falling out. In an interview, he talks about ...

(Brendan Smialowski/AFP/AFP) John Bolton has spent decades navigating the halls of power in Washington, earning a reputation as a leading foreign policy hawk. The veteran diplomat with the trademark ...

Former national security adviser John Bolton turned himself in to federal authorities Friday morning in Maryland and pleaded not guilty after being indicted on charges of keeping top secret documents ...

WASHINGTON — Former national security adviser John Bolton, a fixture of the GOP foreign policy establishment in DC for decades, pleaded not guilty Friday to 18 charges of mishandling classified ...

Former National Security Advisor John Bolton turned himself in to federal authorities Friday morning in Maryland and pleaded not guilty after being indicted on charges of keeping top secret documents ...