President-elect Donald Trump has nominated Keith Kellogg, a former national security adviser and retired lieutenant general in the US military, to be special envoy to Ukraine and Russia in his second administration.

• Kellogg is likely to be at the centre of negotiations to end the ongoing war in Ukraine, should Russia and Ukraine agree to take part.
• Trump has promised to stop the war on his first day back in office - though he has not provided any details on how he plans to do that.
• Kellogg has advocated for tough negotiations with Russia and Ukraine in order to bring the war to an end.