Rashida Tlaib, the lone Palestinian American member of Congress, has released a video in which she has accused US President Joe Biden of allowing genocide in Gaza.
The White House and some Democrats reacted sharply to that, reports BBC.
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Republicans in the House have introduced two separate measures to censure her amid criticism of her remarks from both parties.
Tlaib stated that her colleagues were "more focused on silencing me than they are on saving lives".
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Tlaib, a Democrat, addressed Biden directly in a video shared to social media on Friday, calling for a cease-fire.
It included videos of Biden expressing his support for Israel, as well as footage of those killed and wounded in Gaza and pro-Palestinian marches around the United States.
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"Joe Biden supported the genocide of the Palestinian people," titles at the end of the video read. "The American people won't forget."
People in the video are also shouting the phrase "from the river to the sea," which advocates for Palestinian rule of all area between the Jordan River and the Mediterranean Sea, including Israel.
According to Jewish organizations such as the Anti-Defamation League, the phrase is a call to destroy the state of Israel.
Some pro-Palestinian activists argue that the majority of those singing it are asking for an end to Israel's occupation of the West Bank and siege of Gaza, rather than the destruction of Israel itself, the BBC report added.
Tlaib is one of just three Muslim legislators in US Congress. She has long enraged party officials and pro-Israel organisations with her unwavering condemnation of Israel.
The slogan is "an aspirational call for freedom, human rights, and peaceful coexistence, not death, destruction, or hate," she said defending her latest remarks.
However, the remark has sparked outrage from all quarters, even Democratic friends in her home state.