Trump issued the 50-day ultimatum to Putin earlier in July, warning that his potential economic penalties against Moscow and its trading partners would be devastating if the conflict wasn’t halted by early September.
“We thought we had that settled numerous times, and then President Putin goes out and starts launching rockets into some city like Kyiv and kills a lot of people in a nursing home or whatever,” Trump added on Monday.
Trump has held multiple calls with Putin but made scant progress toward ending the Ukraine war, after promising on the 2024 election campaign trail that he would curtail hostilities in one day.
The third round of Ukraine-Russia peace talks last week ended without any agreement on a ceasefire.
As attempts to broker a ceasefire fizzle, Trump has began to voice rare criticism of Putin — calling him “crazy” and noting that “there’s a bit of an issue with him” — in recent weeks as the Kremlin intensifies its shelling of Ukraine.
The U.S. president, whose administration had temporarily halted some promised munitions for Ukraine, also agreed to sell American weapons to Europe and let countries donate them to Kyiv.
This story is being updated.