Senate Minority Leader Chuck Schumer called for Democratic Party unity on Wednesday, but a contentious feud between Sen. John Fetterman and Sen.-elect Abdul El-Sayed over U.S. military assistance to Israel could challenge efforts to unite the caucus in the 120th Congress.

The two Democrats exchanged sharp insults throughout the 2026 election cycle, clashing over issues including military aid to Israel, Medicare for All, and the ideological direction of the Democratic Party.

El-Sayed reportedly told progressive donors during a private Zoom call that "you put one ogre on a pike, and then everyone else gets the message," an apparent reference to challenging moderate Democrats in primary elections. During a televised primary debate, El-Sayed confirmed the remark was directed at Fetterman, accusing the Pennsylvania senator of abandoning his values by supporting U.S. military assistance to Israel.

Fetterman, a proponent of U.S. military aid to Israel and its Iron Dome missile defense system, has criticized El-Sayed's opposition to the war in Iran and U.S. aid to Israel. Fetterman responded to El-Sayed's remarks by referring to him as the "Pontiac Platner," a jab at a Maine Democrat who withdrew from his Senate race amid scandals. Fetterman also accused El-Sayed of seeking to lead "our emerging pro-Hamas wing here in the party."

Further fueling the dispute were El-Sayed's campaign appearances with left-wing streamer Hasan Piker, who had previously stated that "America deserved 9/11." Fetterman publicly condemned Piker's remarks.

The tensions escalated after El-Sayed narrowly defeated Rep. Haley Stevens in the Democratic primary. Days before the general election, reports emerged that El-Sayed's campaign had barred Stevens from attending its final campaign events, drawing further criticism from Fetterman.

"Rep. Haley Stevens simply held Abdul El-Sayed accountable for his views on Israel and fixation with Jewish money. El-Sayed is going after a woman and banning her from campaign events for having an opinion," Fetterman told Jewish Insider. He added, "He has the worst case of little man syndrome I've ever seen."

Despite the public hostility, a longtime Democratic Senate staffer told Fox News Digital that they would "not be surprised" if tensions emerged but expressed confidence that loyalty to the party would outweigh personal disagreements. The staffer suggested that Fetterman has faced criticism from other members of the Senate Democratic caucus before, but those disagreements have not prevented lawmakers from working together.

The feud could present an early test for Schumer as he aims to maintain unity among Senate Democrats, particularly on contentious issues such as U.S. foreign policy and the party's progressive agenda.

El-Sayed and Fetterman did not respond to requests for comment from Fox News Digital.