Whether the U.S.-Russia summit can lead to a deal to produce peace in Ukraine more than 3 1/2 years after Moscow’s invasion remains to be seen.

US President Donald Trump warned he would impose “very severe consequences” if Vladimir Putin didn’t agree to a ceasefire agreement later this week, following a call with European leaders ahead of his meeting with the Russian president.

President Donald Trump Wednesday held tense talks with Ukraine’s Volodymyr Zelenskyy and European leaders ahead of his crucial Alaska summit with Vladimir Putin on Friday. With nerves running high, Zelenskyy said the talks went well and Trump agreed that he hoped the summit with the Russian leader could lead to an immediate ceasefire.