When the Senate voted last week on a resolution intended to limit the president’s authority to continue military operations against the Islamic Republic of Iran, the outcome was predictable: Democrats largely supported the measure as a check on the Trump Administration, while Republicans largely opposed it. Only one Democrat broke with his party to do what was right for the United States.

The Senator in question is Pennsylvania’s John Fetterman, who voted with Republicans to oppose the resolution. Over the weekend, he tweeted, “Why do Democrats now universally condemn what achieves a top, longstanding Democratic priority?”

Fetterman’s vote is not surprising; his vote is a reflection of a divergence within the Democratic Party over how to understand the October 7 Hamas massacre and the war that followed.

For many Democrats, the months and years since October 7 have been politically disorienting. The immediate aftermath of the attack produced a brief moment of bipartisan clarity: Hamas’s atrocities were universally condemned, and Israel’s right to defend itself was widely affirmed. Yet as Israel’s military campaign in Gaza unfolded and regional tensions escalated, the center of gravity inside the Democratic coalition shifted.

Progressive activists, campus movements, and a growing number of elected officials increasingly framed Israel as the wrongdoer and aggressor. This inversion of reality has had profound ramifications.

Democratic Members of Congress have introduced measures to restrict arms transfers to Israel, authored cease-fire resolutions, and caterwauled against American military involvement in any confrontation with Iran. The war powers resolution that came before the Senate this week reflects the inversion of reality: it is designed to restrain America and Israel, rather than the actual state sponsor of terrorism, the Islamic Republic.

Fetterman has approached the situation from a very different set of values and beliefs. Since October 7, he has consistently framed the conflict in terms that once would have been entirely familiar within the Democratic Party of not so long ago.

Those instincts would have sounded routine inside the Democratic Party a generation ago.

While serving as United States Ambassador to the United Nations, Daniel Patrick Moynihan gave an impassioned defense of Israel and Zionism while opposing the infamous and slanderous United Nations General Assembly Resolution 3379, which declared that “Zionism is a form of racism and racial discrimination.” Moynihan correctly observed that Resolution 3379 “reeked of the totalitarian mind, stank of the totalitarian state.” After his tenure at the U.N. was complete, Moynihan went on to represent New York in the United States Senate for more than two decades as a Democrat.

These figures believed that liberal values – democracy, minority rights, political freedom – were not abstractions but commitments that required defending democratic societies against regimes that openly violated them.

The experience of the Iraq and Afghan Wars fostered deep skepticism toward American military intervention, particularly among younger Democrats and progressive activists.

The Israeli-Palestinian conflict has become one of the clearest arenas where that shift is visible. Within many so-called progressive circles, Israel is now framed less as a democratic ally under threat and more as an occupying power deserving condemnation. In that framework, distancing the United States from Israel – or conditioning support for it – becomes a logical extension of progressive politics.

Consider Gavin Newsom, the California Governor who is likely to run for President in 2028. Recently, Newsom has suggested that the United States might need to reconsider aspects of its support for Israel, language that signals a willingness to place distance between Washington and Jerusalem during an ongoing regional conflict. Newsom, who has previously been supportive of Israel, senses the way the political winds are blowing in his party.

In contrast, Fetterman’s approach reflects a fading tradition within the party–one that views solidarity with democratic allies and confrontation with authoritarian regimes as natural extensions of progressive values. Newsom’s approach reflects the emerging consensus within much of the Democratic coalition, in which skepticism toward American power and discomfort with Israel’s military actions shape the boundaries of acceptable political rhetoric.

When the chamber considered whether to restrict military action against Iran, the Democratic caucus largely aligned with the newer instinct: caution, restraint, and distance from the use of American power in the region.

John Fetterman stood alone on the other side of that divide.

Whether his stance represents the beginning of a broader reconsideration inside the Democratic Party – or simply the last echo of an older tradition that once defined it – remains to be seen. What is clear is that when the Senate cast its votes, the line separating those two visions ran straight through the Democratic Party itself.

Shabbos Kestenbaum is a political commentator at PragerU and a former lead plaintiff in a civil rights lawsuit against Harvard University. He wrote this for InsideSources.com.