Mr. Netanyahu rebuffed Mr. Biden’s push for greater efforts to avoid civilian casualties in a phone call on Monday. And he has pushed ahead with what he has called “mighty vengeance” for the Oct. 7 attacks, using huge bombs to collapse Hamas’s network of tunnels, even if they also collapse whole neighborhoods in Gaza.

In Ukraine, the country’s most senior military commander, Gen. Valery Zaluzhny, uttered the word last week that American officials carefully avoided for the better part of a year: stalemate. Many of Mr. Biden’s aides agree that Ukraine and Russia are dug in, unable to move the front lines of the battle in any significant way.