Congresswoman Rashida Tlaib of Michigan declined to endorse Kamala Harris at a union rally in Detroit, where the war in Gaza is the top issue for the largest bloc of Arab American voters in the country.

Tlaib, the first Palestinian-American woman in Congress, is the only one from the so-called left-wing “group” who did not support the Democratic candidate. The other three members — Ayanna Pressley of Massachusetts, Ilhan Omar of Minnesota and Alexandria Ocasio-Cortez of New York — endorsed Harris in July.

“Don’t underestimate the power you all have,” Tlaib told United Auto Workers voters turning out to vote. “More than these ads, these lawn signs, these billboards, you all have more power to produce people who understand that we must stand up against corporate greed in our country.”

Tlaib’s rejection of Harris comes as a voter poll released Friday found that 43% of Muslim American voters support Green Party candidate Jill Stein.

After Hillary Clinton’s loss to Donald Trump in 2016, Democrats blamed Stein voters for Michigan and Wisconsin’s defeats to the Republican candidate. Some Democrats fear the same scenario could repeat itself next week.

Earlier this year, about 100,000 voters in Michigan marked their ballots as “non-binding” during the presidential primary as a sign of protest against the Biden administration’s support for Israel’s invasion of Gaza following the cross-border Hamas attack in October last year that killed 1,200 people were killed and took more than 200 hostages, mostly civilians.

The Israeli attack on Gaza has since killed more than 40,000 people, including many women and children. In Lebanon, where Israel has now invaded to fight with the Iran-backed Hezbollah, more than 2,897 people have been killed and 13,150 injured, according to the country’s health ministry. A quarter of those killed were women and children.

The US has been a staunch ally of Israel during the fighting, continuing to supply arms to the country and limiting its public criticism of Israeli actions.

Tlaib criticized the Democratic Party’s position on the growing and bloody conflict, saying it was “hard not to feel invisible” after the party did not invite a Palestinian-American speaker at its convention in Chicago in August.

In an interview with Zeteo, the news organization founded by former MSNBC anchor (and Guardian contributor) Mehdi Hasan, Tlaib said the omission “made it clear to their spokespeople that they value Israeli children more than Palestinian children.”

“Our trauma and pain feels invisible and ignored on both sides,” she added. “One party uses our identity as an insult and the other refuses to hear from us. Where is the common humanity? Ignoring us will not stop the genocide.”

Harris faced sustained protests along the way as demonstrators called on her to break with President Joe Biden and support an arms embargo on Israel. Harris said Israel has “the right to defend itself” and that Palestinians need “dignity and security.”

Two weeks ago in Wisconsin, when Harris confronted a protester accusing the Jewish state of genocide, he said: “I know what you’re talking about. I want a ceasefire. I want the hostage deal to be completed. I want the war to end.”

At a rally in Dearborn on Friday, Tlaib criticized Republican presidential candidate Donald Trump, who was supported by the Muslim mayors of Dearborn Heights and Hamtramck.

“Trump is a proud Islamophobe + serial liar who doesn’t stand for peace” Tlaib posted on X. “The reality is that the Biden administration’s unconditional support of genocide got us here. This should be a wake-up call for those who continue to support genocide. This election didn’t have to be close.”