Many voters believe, with good reason, that none of this would have happened without Biden’s assent. Biden has continued to speak of Israel’s attack on Palestinian civilians using the absurd language of “self-defense”. He has insulted Jewish Americans and the memory of the Holocaust by invoking them to justify the slaughter. And though his White House repeatedly leaks that he is “privately” dismayed by Israel’s conduct of the war, he has done little to stop the flow of US money and guns that support it.

Even after the US state department issued a vexed and mealy-mouthed report on Israel’s conduct, which nevertheless concluded that it was reasonable to assess that Israel was in violation of international humanitarian law, the Biden administration has continued to fund these violations. That state department report was published on 10 May. The Biden administration told Congress that it intends to move forward with a $1bn arms sale to Israel. “OK, [Israel] likely broke the law, but not enough to change policy,” is how one reporter summarized the administration’s judgment. “So, what is the point of the report? I mean, in the simplest terms, what’s the point?”

Meanwhile, Biden has expressed public disdain for the Americans – many of whom he needs to vote for him – who have taken to protest on behalf of Palestinian lives. Speaking with evident approval of the violent police crackdowns against anti-genocide student demonstrations, he said coolly: “Dissent must never lead to disorder.”

On the issue of Gaza, Biden is dramatically out of touch with the voters he needs to win re-election. If he will not be moved by morality to stop his support of this war, he should be moved by vulgar self-interest. Gaza is not a distant foreign conflict: it is an urgent moral emergency for large swaths of voters. Biden will lose those voters – and may indeed lose the election – if he does not cease his support of these atrocities.

Biden has that rare opportunity in politics: to help the country, and himself, by doing the right thing. But he must do so now. Both the Palestinian people and his own election prospects are running out of time.