US President-elect Donald Trump nominated retired General Keith Kellogg as a special Ukrainian peace envoy to lead negotiations on an end to Russia's full-scale war. Who is he, and what are his views on Russian invasion?

There was a cautious note of optimism among some Ukrainians for retired Gen. Keith Kellogg’s past supportive remarks for Ukraine to defend itself.

The retired Army lieutenant general could play a key role in any negotiations to end the yearslong war between the countries.