On several occasions, National Security Adviser Jake Sullivan ordered the Pentagon to divert air defense interceptors from ...

President Trump has convulsed the political landscape of the world with his 90-minute phone call with Russian President ...

whom Trump has tapped to serve as his national security adviser, has held several conversations on Ukraine with President Joe Biden’s national security adviser, Jake Sullivan, NBC News ...

Moscow on Tuesday freed an American prisoner after the first-known visit by a member of President Donald Trump's ...

President Donald Trump has revoked security clearances for Antony Blinken, the former secretary of state, and Jake Sullivan, ...

The 46th president mixed foreign weakness with domestic fecklessness to make his administration an era-defining bad example.

In addition to technical support, the U.S. has spent significant money, including $1.5 billion sent last September, to boost Ukraine’s drone production, officials said. Jake Sullivan ...

Jake Sullivan, Mr. Biden’s national security ... But Volodymyr Zelensky, Ukraine’s president, is suspicious that it’s all talk. Remembering that no one paid much attention to the 1994 ...

home to a once-promising but now grinding war of attrition with Russia over Ukraine, China is Sullivan’s proudest portfolio. “It’s what he wants to be remembered for,” said a second U.S ...

The US officials noted that the support included helping Ukraine develop a new generation of drones which US officials say are revolutionising the way warfare is conducted. US National Security ...