Biden’s comment drew a quick response. A spokesman for Mr. Putin, Dmitri S. Peskov, told the TASS, the state-owned news agency, that personal insults such as this “narrow down the window of opportunity for our bilateral relations under the current administration.”
Poland has received more than two million refugees, by far the largest number of the more than 3.5 million who have fled the fighting.
On Thursday, Mr. Biden announced that the United States would send another $1 billion to help Poland and the other eastern allies with the humanitarian crisis, bringing the total American aid to more than $2 billion since the run up to the invasion of Ukraine.
Earlier on Saturday, Mr. Biden told President Andrzej Duda of Poland that he recognizes the burden his country is under and promised that the American people will continue to provide assistance for the Ukrainian people.
“We do acknowledge that Poland is taking on significant responsibility,” he said. “I don’t think it should just be Poland. It should be the whole world, all of NATO’s responsibility.”