How Much Is Biden’s Support of Israel Hurting Him With Young Voters?

As recently as this summer, a poll with Donald J. Trump leading among young voters would have been eye-popping.

Now, it’s increasingly familiar — and our new New York Times/Siena College national survey released Tuesday morning is no exception.

For the first time, Mr. Trump leads President Biden among young voters in a Times/Siena national survey, 49 percent to 43 percent. It’s enough to give him a narrow 46-44 lead among registered voters overall.

Usually, it’s not worth dwelling too much on a subsample from a single poll, but this basic story about young voters is present in nearly every major survey at this point. Our own battleground state surveys in the fall showed something similar, with Mr. Biden ahead by a single point among those 18 to 29. Either figure is a big shift from Mr. Biden’s 21-point lead in our final poll before the midterms or his 10-point lead in our last national poll in July.

And there’s a plausible explanation for the shift in recent months: Israel.

As my colleagues Jonathan Weisman, Ruth Igielnik and Alyce McFadden report, young voters in the survey took an extraordinarily negative view of Israel’s recent conduct: They overwhelming say Israel isn’t doing enough to prevent civilian casualties in Gaza, believe Israel isn’t interested in peace, and think Israel should stop its military campaign, even if it means Hamas isn’t eliminated.

You might think that the young voters with these progressive or even left-wing views would be among the most likely to stick with Mr. Biden. At least for now, that’s not the case. The young Biden ’20 voters with anti-Israel views are the likeliest to report switching to Mr. Trump.