Evidence indicates that US President Joe Biden is facing a new critical moment of “truth” in the war that Israel has been waging against Gaza for six months without respite, as Israel confirms that it will move forward with the invasion of the city of Rafah in the southern Gaza Strip, in which about 1.5 million people are besieged. One million Palestinians, most of them displaced.

According to all assessments, such an invasion will come at a time when American rejection of Israel’s actions reaches unprecedented levels, as a poll conducted by Gallup last week showed the extent of the erosion of traditional American support for Israel, as the death toll in Gaza exceeded 32,000, most of them women. And children under six months.

The Gallup poll showed that more Americans, by about 20 points, now disapprove of Israeli military operations in Gaza.

The poll also showed that 55% of Americans do not agree with this, while only 36% agree with it. Back in November, a poll conducted by the same organization found that a small majority of Americans approved of Israel's actions, 50% versus 45%.

The roar of opposition from Democratic voters has become louder. Three out of four Democrats said they now disapprove of Israel's actions, according to the Gallup poll, while only 18% agree. Seven percent did not express any opinion.

Pollsters also noted that Biden's behavior regarding the Gaza conflict was "the lowest of five issues tested in the poll." This is “because far fewer Democrats (47%) approve of how he has handled the situation between Israelis and Palestinians than with his handling of the economy, environment, energy policy and foreign affairs more broadly,” they said.

This poll is the latest development in a series of political moments that have shown Democrats' growing anger at the actions taken by the Israeli government led by Israeli Prime Minister Benjamin Netanyahu - a government that is widely viewed as the most right-wing in Israel's history.

In November, organizers said a massive march in solidarity with Gaza was the largest pro-Palestinian demonstration in US history. Later that same month, pro-Palestinian demonstrators clashed with police at the Democratic National Committee headquarters.

In February, more than 100,000 people voted “noncompliant” in Michigan’s Democratic primary, a choice that was widely seen as a protest vote against Biden’s policies on Gaza. Shortly thereafter, the percentage of “uncommitted” voting in Minnesota was higher, about 19%, than the 13% in Michigan.

Left-leaning voices have become increasingly assertive in demanding that Biden and his administration do more to limit Israel's actions.

Senator Bernie Sanders (from Vermont) last week repeated his call for the Netanyahu government not to receive “another dollar” from the United States in exchange for what Sanders described as its “immoral war against the Palestinian people.” Rep. Alexandria Ocasio-Cortez (D-N.Y.) described Israel's actions in Gaza as "unfolding genocide" in a recent speech in the House of Representatives.

But it was Senate Majority Leader Charles Schumer (D-N.Y.) who underscored how even traditional Democrats now feel acute concerns about Netanyahu's behavior, with Schumer, the country's top Jewish-American elected official, criticizing the Israeli prime minister in a speech in mid-Month. March, when he said that “Netanyahu has lost his way” and called for new elections.

None of that affected Netanyahu, who responded to Schumer's speech by calling it "totally inappropriate."

Netanyahu also expressed his determination to continue plans to invade Rafah, where it is estimated that more than a million Palestinians are taking refuge. He and his allies say such a step is necessary to defeat Hamas.

Experts believe that the invasion will increase the pressure on Biden even more. At the same time, he must contend with a number of Democrats who remain hardline supporters of Israel. At the same time, Republicans are ready to accuse Biden and his party of abandoning Israel and tolerating terrorism.

Biden has significantly modified his rhetoric since the early months of the Israeli campaign, when he strongly embraced Netanyahu. One of the key moments showing the shift (in Netanyahu's speech) came in early February, when Biden described Israel's response to the October 7 attacks as "exaggerated."

Substantively, the biggest shift came last week when the United States facilitated the passage of a UN Security Council resolution (Resolution 2827) calling for a ceasefire in Gaza, as well as the release of hostages. The United States used its veto three previous times against previous United Nations resolutions calling for a ceasefire.

The American refusal to use the veto on this occasion sparked an angry reaction from Netanyahu, who canceled a scheduled trip to Washington for two senior figures in his government, Minister of Strategic Affairs Ron Dermer and National Security Advisor Tzachi Hanegbi, (but he reversed his decision and rescheduled the visit for both Dermer and Hanegbi. To Washington this week.)

It is noteworthy that in an interview with MSNBC on March 8, Biden at the same time referred to the Israeli invasion of Rafah as a red line, but added that he would never abandon Israel.

Biden also proved that he does not pay attention to the demands of progressive Democrats to impose stricter conditions on aid to Israel. He supports a proposal to provide Israel with an additional $14 billion in military aid.

The administration has generally been reluctant to specify exactly what it will do in response to the attack on Rafah.

In turn, Vice President Kamla Harris told ABC News' "This Week" on March 24 that a major Israeli operation in Rafah would be a "huge mistake," and said that in terms of consequences, "I'm not ruling anything out."

But what these consequences might be remains a mystery. Biden's political fate may depend on coming up with a convincing answer.