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.

Brussels — Ukraine and its European backers on Monday sought talks with U.S. President Donald Trump in an effort to protect their security interests ahead of his summit with Russian President Vladimir Putin later this week.

The Kremlin leader believes time is on his side as the exhausted and outgunned Ukrainian forces are struggling to stem Russian advances.