Sikorski congratulates retired General Keith Kellogg on becoming U.S. special envoy for Ukraine

Donald Trump appointed Kellogg to this role on Wednesday. Kellogg, a retired three-star general, had authored a plan for peace between Russia and Ukraine. This plan called for a ceasefire and pressuring both sides to negotiate.

Kellogg had previously served as national security advisor to Vice President Mike Pence and as executive secretary of the National Security Council during Trump’s first administration.

In his message, Sikorski congratulated General Kellogg on his new mission. "Poland is looking forward to working with you on Ukraine and beyond," the foreign minister declared.

Sikorski also included a photo with Kellogg in his post.

Kellogg, who was the chief of staff for the White House National Security Council during Trump's 2017-2021 term and national security adviser to then-Vice President Mike Pence, will likely play a central role in attempting to resolve the conflict in his new position.

While there is currently no special envoy for the war in Ukraine, Trump had privately expressed interest in creating the position.

Reuters was first to report that Trump was eyeing Kellogg for the role.

Quickly winding down the Ukraine war was one of Trump's central campaign promises, though he has avoided discussing how he would do so.

"Keith has led a distinguished Military and Business career, including serving in highly sensitive National Security roles in my first Administration," Trump said on social media.

Kellogg's plan for ending the war, which began when Russia invaded Ukrainian sovereign territory, involves freezing the battle lines at their prevailing locations and forcing both Kyiv and Moscow to the negotiating table, Reuters reported in June.

Kellogg drafted his plan for Ukraine alongside Fred Fleitz, who also served as a chief of staff to the National Security Council under Trump.

Under their proposed strategy, the U.S. would tell Ukraine that it would only get more American weapons if it enters peace talks. The U.S. would at the same time warn Moscow that any refusal to negotiate would result in increased U.S. support for Ukraine. NATO membership for Ukraine would be taken off the table for the immediate future.

That plan would be unlikely to please Kyiv, given that it would in practice give Russia uncontested control of parts of eastern Ukraine, at least for a significant period of time.

Additionally, some Republicans, particularly in the House of Representatives, would likely be reluctant to agree to more aid to Ukraine.