Sen. Bernie Sanders (I-Vt.) is declining to join a progressive group he co-founded in encouraging Michigan voters to spurn President Joe Biden over his support for Israels assault on Gaza.

Our Revolution, a nonprofit that grew out of the progressive icons 2016 presidential campaign, backed the effort to get voters in Michigan to vote uncommitted in the states Feb. 27 presidential primary as a way to protest Bidens support for the war, which was launched in response to the Oct. 7 attack by the militant group Hamas in which about 1,200 Israelis were killed and about 250 people were taken hostage. Israels assault on Gaza has so far led to the deaths of more than 28,000 Palestinians, according to local health officials.

In a statement to HuffPost, Sanders office said he was supporting Biden even though he continues to break with the administration over Gaza, including voting against a Biden-backed bill to toughen border security and send aid to Ukraine because the package also included military aid for Israel.

Our Revolution is a completely independent organization and the Senator had no part in their decision, Sanders spokeswoman Anna Bahr said in a statement. Bernie is supporting the Presidents re-election and wants him to do well in the Michigan primary and elsewhere.

It is no secret, however, that Bernie disagrees with the Administrations position on the war in Gaza. He strongly opposes providing the right-wing Netanyahu government with the $10 billion in the foreign aid supplemental to continue its horrific war against the Palestinian people.

The decision by Sanders, who is Jewish, shows how the war in Gaza, and Bidens handling of it, has split both the progressive movement and the Democratic Party more broadly. Polling has shown Democrats are increasingly skeptical of the right-wing Israeli governments brutal bombing campaigns, and many Muslim Democrats and progressives have said they would struggle to support Biden if he continues to back the military campaign.