PALM BEACH, United States — Ukrainian President Volodymyr Zelenskyy will sit down Sunday with Donald Trump and seek to secure the U.S. president's stamp of approval for a new proposal to end the nearly four-year conflict with Russia. The 20-point plan, which emerged from weeks of intense U.S.-Ukraine negotiations, lacks Moscow's approval, and the face-to-face in Florida comes in the wake of a massive Russian missile and drone attack on Kyiv. The meeting, to be hosted by Trump at his opulent Mar-a-Lago residence at 1:00 pm (1800 GMT) Sunday according to the White House, will be the pair's first in-person encounter since October, when the U.S. president refused to grant Zelenskyy's request for long-range Tomahawk missiles. During a stopover in Canada on Saturday, Zelenskyy said he hoped the talks would be "very constructive" and said Russian leader Vladimir Putin had shown his hand with the latest assault on the Ukrainian capital. "This attack is again, Russia's answer on our peace efforts. And this really showed that Putin doesn't want peace," he said. Europeans vow support While in Canad