Trump has touted Friday's summit in Alaska as a chance to get a breakthrough but Zelensky's likely absence from the talks and repeated rejection there can be any land swaps have added to doubts that any genuine diplomatic progress can be made.

President Trump says he expects to know quickly if a deal can be made with Russian leader Vladimir Putin to halt the war in Ukraine.

Friday's meeting will mark the first time Putin will be in the U.S. since 2015. Trump on Monday mistakenly said he was "going to Russia" as he discussed the summit, though he also praised the fact that Putin is coming to the U.S. rather than the other way around.