Russia on Wednesday unleashed a broad attack that hit Ukrainian power plants, a kindergarten and other sites, killing six people. The barrage came hours after President Trump said he was putting off a planned meeting with President Vladimir V. Putin of Russia to avoid a “wasted” effort toward ending the war.
Mr. Trump had said late last week that he would meet soon with Mr. Putin in Hungary to continue peace talks. But on Tuesday, after discussions between American and Russian officials, the White House said no summit meeting was planned “in the immediate future.”
The Trump administration announced the delay after Russian officials made clear that they would not budge from their maximalist demands to halt their invasion of Ukraine, again rejecting a proposal for a cease-fire that freezes the current front lines.
On Wednesday, video footage posted by Ukrainian officials on social media showed emergency workers carrying young children from a burning kindergarten in the northeastern city of Kharkiv. The strike on the kindergarten killed one person and wounded several others, officials said.
President Volodymyr Zelensky of Ukraine said that the assaults showed that “Russia clearly doesn’t feel enough pressure to stop prolonging the war.”
The Russian barrage prompted nationwide power restrictions for industrial consumers and emergency blackouts for civilians in several regions, including the capital, Kyiv. The strikes followed a pattern in which Russia has unleashed major attacks on Ukraine after significant moments in diplomacy with the Trump administration. Russia also conducted drills on its own territory on Wednesday involving nuclear weapons, including test launches of intercontinental ballistic missiles, the Kremlin said.
Mr. Zelensky reiterated on Tuesday that Ukraine needed more long-range weapons to give it leverage to pressure Moscow to stop its invasion. The Ukrainian leader met with Mr. Trump at the White House on Friday but emerged from those contentious talks without a deal he was seeking to buy American long-range missiles.
While publicly supporting Mr. Trump’s efforts at peacemaking, Ukrainian officials have consistently said that Moscow will halt its attacks only if Kyiv can retaliate sufficiently.
Ukrainian analysts said they were hopeful that Mr. Trump was beginning to recognize Mr. Putin’s tactic of stringing the Americans along by agreeing to high-profile meetings that produce little in the way of results. Russian officials welcomed the proposal for a summit in Budapest after Mr. Trump held a call with Mr. Putin on Thursday, a day before his meeting with Mr. Zelensky.
“Trump realized that this meeting would be a catastrophe, and he would gain nothing but shame,” said Mykhailo Samus, director of the independent New Geopolitics Research Network in Kyiv. “But the question is, what is next? Will Putin be able to get him to such a meeting again?”
“It is important for President Trump to understand that a Nobel Peace Prize is possible only by pressuring Putin, not by shouting at Zelensky,” Mr. Samus added.
Mr. Trump has shown remarkable deference to Mr. Putin. The American president has not followed through on his threats to punish Russia for refusing to end the war. And amid warnings from the Kremlin, he has so far not provided American Tomahawk missiles to Kyiv.
But seemingly emboldened by his role in securing a cease-fire in Gaza, and ever focused on his publicly stated desire to win a Nobel, Mr. Trump has pushed to restart a peace process for Ukraine that had stalled after his meeting with Mr. Putin in Alaska this summer.
While Mr. Zelensky emerged from his talks last week with Mr. Trump without new weapons, he did secure continued U.S. support for Kyiv’s position when it comes to territory. Moscow has signaled that it is holding out for Ukraine to surrender the parts of the eastern Donetsk region still under Ukrainian control, a nonstarter for Kyiv.
Mr. Zelensky will meet on Thursday with European leaders in Denmark to seek additional support from European nations, which have become the primary backers of Kyiv’s war effort since Mr. Trump ended direct American aid. European leaders have joined with Ukraine in calling for an immediate cease-fire at the current battle lines.
Mr. Trump was scheduled to meet on Wednesday in Washington with Mark Rutte, the secretary general of NATO, which said Ukraine would be among the subjects of discussion.
Since the spring of this year, said Mr. Samus, the analyst, Russia has entered talks with one primary goal: to delay any cease-fire and to block the United States from providing long-range weapons to Ukraine.
While Mr. Putin has largely succeeded so far, the postponed meeting in Budapest showed that the Russian president may be losing his ability to rely on the same tactic again and again, Mr. Samus said.
Mr. Zelensky also called out the Russian tactic.
“Russia continues to do everything it can to weasel out of diplomacy,” he said on Tuesday. “As soon as the issue of long-range capabilities for us, for Ukraine, became less immediate, Russia’s interest in diplomacy faded almost automatically.”