Trump’s incoming national security adviser has previously suggested Washington may have to escalate to force Russia to the negotiating table.

Marco Rubio, who voted against a multi-billion aid package for Ukraine earlier this year, is expected to take a top role in Donald Trump's White House. Meanwhile, an analyst has said he expects the president-elect will "throw Ukraine under the bus".

A senior NATO military official suggested that any peace deal negotiated by President-elect Donald Trump that allowed President Vladimir Putin of Russia to claim victory in Ukraine would undermine the interests of the United States.

UK Defence Secretary John Healey believes that if reports of a phone conversation between Vladimir Putin and US President-elect Donald Trump are accurate, this could signal a positive development for Ukraine.

EU foreign policy chief Josep Borrell warned Monday that letting Russia win in Ukraine would represent a loss for the United States, as Donald Trump prepares to return to the presidency.

By Tom Ozimek Contributing Writer Former NATO Secretary-General Jens Stoltenberg has urged European leaders to step up their defense spending commitments to keep the transatlantic alliance strong in the face of