Trump said the two leaders will meet next Friday. It remains unclear whether Ukrainian President Volodymyr Zelenskyy will be involved with the high-stakes summit.

President Donald Trump has set Friday as a deadline for Russia's Vladimir Putin to agree to a ceasefire with Ukraine or face secondary sanctions.

Trump has met in-person with Zelensky at least three times since returning to office, including a Feb. 28 meeting where he lashed out at the Ukrainian president and accused him of prolonging Russia’s invasion. The two leaders met again on April 26 on the sidelines of Pope Francis’ funeral and in The Hague on June 25.