Editor's note: This story has been updated with a comment from the White House. Keith Kellogg, formerly U.S. President Donald Trump's envoy on Ukraine and widely regarded in Kyiv as one of the most pro-Ukrainian voices in the White House, said his work on Ukraine is far from over after leaving government at the end of 2025. A highly decorated, retired three-star U.S. Army general stepped down on Dec. 31 and has since joined the America First Policy Institute, a Washington think tank. In an in