Donald Trump has tapped Keith Kellogg, a retired lieutenant general who presented him with a plan to end the war in Ukraine, to serve as a special envoy for the conflict, the president-elect wrote on Truth Social on Wednesday.

Donald Trump picked retired General Keith Kellogg as his special envoy for Ukraine and Russia, choosing a longtime adviser who’s supported the president-elect’s aims to end the war swiftly, including by potentially cutting off military aid to Kyiv.